Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f26c1029ff79ce1…

MALICIOUS

PDF

100.9 KB Created: 2021-08-11 06:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9f0139e257f49c2121fb4bd123580daa SHA-1: 831d7daf90cf8872d1d181e31e629959d8282097 SHA-256: 6f26c1029ff79ce13cbcbcd4ae0345c17e07afbd627b7fdde904bc15c0f6e3b3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains embedded JavaScript, indicating it likely attempts to execute malicious code. The document also features a link farm pointing to various domains, some of which are hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://accesoriosalmayor.com/images/userfiles/file/zanagenopasufutu.pdf In PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ukgqcgc35sul4jq5dqv11msdja/65605279800.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782bb306df5---45233126131.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/46802668655.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/barilenukemeji.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f0d5b0d8f---94792681164.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f16d5629d4---41863861802.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160773273d6313---kozasigoz.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/19314504612.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7c73d1915---fefagexezaduxuxopag.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/14490104130.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021051072725_46054707.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/bokuz.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lijavodidikamigosexukosu.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/90013258700.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/55068444265.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/5f23cce9b7f98f214e926c9272ad7b79/12027030931.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/l55tnvvv0a4eaps0stv5hkqq64/jutokiwotozexujemesimunen.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a11dcc0cd28---pifugugenazef.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc31de038a---wudilujegimeviresaforadu.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/77271304677.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/rolewuguwaloturogoguje.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/07cd6a1af0752df9e5c5fd644c449cf0/romebomamaruxipawo.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb40724dec---lebewajekogabaxeboxit.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/waxev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=suma+de+vectores+metodo+del+paralelogramo+ejercicios+resueltos+fisica+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001202d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 18856 bytes
SHA-256: 70a5ee2472beb45a6e5f3af0d0f1b01f5c1eb5132e954ed08f5dd3a5497fc70b
font_01_sfnt_off0001509a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1509A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000168b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B1 11232 bytes
SHA-256: 94367eb7c32169f2f0c837d0326d404fbaef84cb59ac24b3258254d8c9280931