Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a85d61ecdc731e…

MALICIOUS

PDF

127.4 KB Created: 2021-06-29 12:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 033a926037e2664573a668e2de87becc SHA-1: c19a7330ee34351d5a3ffd8f0246c16ba13073a8 SHA-256: a0a85d61ecdc731ec61f50d7c9cbb7099853282f75e21eec6eda9d81b569c26c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to potentially compromised websites or directly to IP addresses, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://clinicaveterinariagussago.com/userfiles/files/67753667516.pdf In PDF document text
    • http://chukysovin.com/img-svc/files/mokuzimumorojulu.pdfIn PDF document text
    • http://jsdarvin.com/files/53250569942.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607940d7079d0---ramuma.pdfPDF link annotation
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/3c23461b72689ea3abb58971672e8473/29925207389.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b7d820e12---15099959259.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16096a7654dee6---80086487223.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/9e81f55c39bec4d24a04b1b224a0c8f7/dikeneb.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/sisoxiwiragemasojesavago.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f9fe85426---napegusirakejoserezip.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b631c5bb32e---pagiripomukobebufubef.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/xodalugixo.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/96131013297.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2007638ed---bibewelajamesilefodewezis.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607388096976a---46182918594.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/0e7jgrrjcl18ef0aii6ql590q4/33652506787.pdfIn PDF document text
    • https://x-software.cz/data/file/40680442314.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/jaminezilaxiserasin.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///82782093969.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/jd3gqrjjdh7nht92ocf7vstak6/93095417160.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acf13421c5a---lavukisuborovikelapi.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/jegelanilowasovewaju.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1f669c8c---pibux.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b71608c44da---patemewewobasoxavikuri.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702a902c5f4---36413062887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what+is+the+past+tense+of+endPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000191a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9B3 18000 bytes
SHA-256: 1dda2ff8234285da8b9e6138b192f6202ee1f4dd7f7b89bd27597d2db127f8f7
font_02_sfnt_off0001d854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D854 10444 bytes
SHA-256: a551a05a286da292a87babe6a201a9ecf3e851624571cde15a533b2d0670c7e8

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