Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4477171d60b47eb…

MALICIOUS

PDF

112.2 KB Created: 2021-02-06 22:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 78dc895f061a01893d6bb50a59975c65 SHA-1: aaf5f0cc13010a8173de86d2c87be520be59ceb4 SHA-256: f4477171d60b47ebb81c3deda67a147b031acc862c181901dbb258e754c427dd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URIs pointing to various domains, including disposable hosting services. The primary purpose appears to be directing users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=acr+contrast+manual+2015 PDF link annotation
    • https://cdn.sqhk.co/waxigapo/b2ttzjd/ninja_blender_cups_24_oz.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/85809.pdfIn PDF document text
    • https://cdn.sqhk.co/tinajugezepi/Zz4vjcx/gajeweranujaxaveler.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/X1KnifZ/geometry_dash_world_levels_online.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/569skic/55733580976.pdfIn PDF document text
    • https://vazewelekataba.weebly.com/uploads/1/3/1/6/131606588/lasegova_wokivonoperede.pdfIn PDF document text
    • https://xakowuval.weebly.com/uploads/1/3/5/3/135316831/ripasuberigipux.pdfIn PDF document text
    • https://demifezi.weebly.com/uploads/1/3/1/3/131379940/5027203.pdfIn PDF document text
    • https://wotuterivakevom.weebly.com/uploads/1/3/4/6/134608936/9978502.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/fE1gcha/.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hmbQgg4/dejaligav.pdfIn PDF document text
    • https://bugabomusajo.weebly.com/uploads/1/3/4/5/134509224/zewegano.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/hgdhcAm/pivilal.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/jgwijXQ/switch_lite_accessories_etsy.pdfIn PDF document text
    • https://nililekekikare.weebly.com/uploads/1/3/0/7/130739967/8387773.pdfIn PDF document text
    • https://rotalexabif.weebly.com/uploads/1/3/1/3/131381819/refumotunopesuv.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/3Beumhc/10249062264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wizuluworafid/73601062874.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/disney_happily_ever_after_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/cisco_3650-_48ps-_s_datasheet.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A41 5100 bytes
SHA-256: 3288fa5cd1c3c20bd9f604942f042273af989d567c2f455b0d25a6e3de4c586e
font_01_sfnt_off00017b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B74 12800 bytes
SHA-256: 01cbde83a55a2d670b55fa68a2febd082a41ce6d7b116974ed9e3bc3101a60e2
font_02_sfnt_off0001a51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A51F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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