Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba070b2ee7b97de…

MALICIOUS

PDF

78.0 KB Created: 2021-09-09 05:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7f7b3c19e35818ab786190a19a425c16 SHA-1: 841e5062eb0327cafca0cebb200ff2d251417376 SHA-256: 7ba070b2ee7b97de4ffe3b17d08b13d4d0837b27f2778794a8e604cabd768759
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs pointing to various domains, some of which are hosted on IP addresses or appear to be compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further payloads. The document body is heavily obfuscated and unreadable, but the presence of numerous external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://laborke.ru/uplcv?utm_term=write+the+equation+in+vertex+form+calculator PDF link annotation
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/13793104334.pdfPDF link annotation
    • http://homelife-superstars.com/image/files/nipajomazibiwofokajimuf.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/verek.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/288ec6bb91c69ba4da6d6ed985cae8f3/wudixuv.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/33999781008.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/56865805200.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/33328373122.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/3985722310.pdfIn PDF document text
    • https://suacuachuyennghiep.com/uploads/files/77931386362.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/neponadelogonagov.pdfIn PDF document text
    • https://sibconsulting.com/contents/files/276345734.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/80058299895.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/78574518718.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613573c6d108d---likobumik.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/31846002273.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe778e83f3---fajirugitid.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/95915693756.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210909095148_92laxv.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/mvfd1oq1f1jnch4bjelevekc15/69163894068.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/47894017501.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/97505659371.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/41406716263.pdfIn PDF document text
    • https://festacontinua.it/public/file/18382346435.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/dowatilemuwa.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7F 17468 bytes
SHA-256: 34728f803134e01f06835316ffec862dac9166cc62d12e770586d27830e0d805
font_01_sfnt_off0000f8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D5 10840 bytes
SHA-256: 48c685a5d9a8dbfd5734cca7f4ce61b0cd75d32e8260ca7d4ca9f07bfda12ba5

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