Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1474abc30280843…

MALICIOUS

PDF

94.9 KB Created: 2021-06-26 19:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 400cd704725fc59975630b762d1b17d3 SHA-1: 61fe32d16a90151d1fe61f14f5dccfc1911bfb6d SHA-256: d1474abc3028084393fd008ccc5d323e4d8be5498268d27780b08f30fbebe4c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, and contains numerous links pointing to compromised WordPress sites. These links likely serve as a link farm to redirect users to malicious destinations, potentially for phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the links and the compromised hosting suggest an intent to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7be9d97a0---bemijowulezogoxiju.pdf In PDF document text
    • https://ikima.fr/uploads/file/fuvenepubikatenur.pdfIn PDF document text
    • http://fructusartis.com/i/File/juxiga.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/c0af3422ea7649511abcfe054e678705/80784157839.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/3e1629a837a2595cffafa3d1cc9443a4/wanogevove.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/9c271f0ca3918dfb0e10cb9b65755761/ranaginodanixoxoxopixalu.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/69531939573.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/18021380405.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac2ef0752b---84471535186.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/86441554093.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/d29fc89cbce99bb58f393b4580158602/66962057539.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/8b39d4582de93ea95ebcd855791e64c8/10212111947.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5b8404f78a7f104dd830b8446f50d9c/japufazimajewarusowuge.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/31084836961512537bb767c2d3593391/vekibuleda.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcb849f272---walamaxikifabirekiven.pdfIn PDF document text
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/68979407387.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/garosovozun.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0ead938cf---31109205486.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/jarugoruwibowawasigekalol.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b220c0a0b00---rekutiwewaxoxekuxawez.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0960108daf3e04de2f07a37d3e537db0/49728782770.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d59e4855617d6be9bda4f6eb0db006f4/91558884284.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/vibezegog.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f28b6a19c---favazidezilokuzikaro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=kim+possible+time+travel+moviePDF 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_off00010f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 10504 bytes
SHA-256: 22283bf8ce0bb5ac61e57d86e0c0e412613dd92eac05cd6376b34ca4d7c9313e
font_01_sfnt_off000126dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DD 17740 bytes
SHA-256: 8f8cf51557871e547b05488075891303afbd3e927134ea2b89a6ee80b5045728
font_02_sfnt_off000154a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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