Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0601af30219f0c7…

MALICIOUS

PDF

79.5 KB Created: 2021-09-20 01:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 327a15136d53deaf7a92bb799a6f8816 SHA-1: de8820e2df439ca10bf0479c3ddbffc229ca5915 SHA-256: f0601af30219f0c7d659986c1d560b904cbe6913a8024ecb36e591c9d002098d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, many hosted on compromised or disposable domains, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=pokemon+manager+advance+apk PDF link annotation
    • https://myshalewell.com/userfiles/file/gafibaziviv.pdfIn PDF document text
    • http://metroboxservices.com/upload/ckimage/files/82885603085.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/88048687242.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/e34ef6a660b196547297c28245c16e1f/74181318148.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/86996795585.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/be61cb5ecd8d00819273f0a5f9df095b/92737716722.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/7773937558.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/malefuxibazoka.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///33989476857.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jifaxegepe.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/dofibarolov.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/dabewa.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/6923e5e1e2bc9e4faf4138702da159b2/zebedasalofo.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/61242700446.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/37662515047.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/palezazitagewekeva.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/zidefanirenemoletu.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/gemula.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/88021370990.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109050208301439.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/36161411723.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/3fb93ef8b93d7da999f860833f203bfb/35192336501.pdfIn PDF document text
    • http://dejede.com/userfiles/file/80581496664.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/76113020472.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_off0000d0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C7 10612 bytes
SHA-256: 0d13a3a9112164d87c0d4a2e79af78b1c395e41b5e8d33cd3af4db17fb10d98c
font_01_sfnt_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E3 18292 bytes
SHA-256: b20d6f5dade3d8dccda4850892d0756ba63ad8c1a3a887ea12c7b9d8cf5d0317