Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1de93abe8c088a5…

MALICIOUS

PDF

107.2 KB Created: 2021-04-08 06:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f10f68f91362338aadcd38df2fc751d9 SHA-1: ad861ef92f5c39f010f695c01eb5a2cb51be51a7 SHA-256: e1de93abe8c088a54c0a34a2defb42768d3a488fe5a5e362646bcd351daab72d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://fokemale.ru/strik?utm_term=honda+rebel+300+for+sale+houston PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465537/normal_5fdc6b67248e3.pdfIn PDF document text
    • https://guxadudupis.weebly.com/uploads/1/3/4/7/134751999/zaguvomodenu.pdfIn PDF document text
    • https://jewutejaj.weebly.com/uploads/1/3/1/0/131070173/negilalofebozeba.pdfIn PDF document text
    • http://migerov.xyz/80292070882hhpn5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5fca7fc2d8097.pdfIn PDF document text
    • https://pavibizad.weebly.com/uploads/1/3/0/7/130740264/jaxuge_raniniv_xukofokunowa_bofurasux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_606cce1bd3255.pdfIn PDF document text
    • https://gaburidukir.weebly.com/uploads/1/3/4/4/134463400/8316034.pdfIn PDF document text
    • https://lozibojugor.weebly.com/uploads/1/3/1/0/131069840/bebozuxuzidowu-gasisopolurab-timumibosin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421339/normal_5ff5121f47163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426087/normal_6029fae34be86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_60640a4be23b8.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/0575677c6.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/siposub_vumixux_farevosenug_jenatuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5fed090dc48e1.pdfIn PDF document text
    • http://qiwi-wallet.online/shotgun_sound_download_pubgb8ufd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379718/normal_5fee15c5e8bfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5fdf15b88c7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_6056fc7ebbfa9.pdfIn PDF document text
    • http://monongzhlh.space/putolenalanavomogiromuzaz8kuv.pdfIn PDF document text
    • http://raisinsapp.pro/776041099363r98e.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://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_e2d50dca9c6f469093877843619bf408.pdf?index=trueIn PDF document text
    • https://804b95bc-9ca4-448d-a094-5a8e1ff69a26.filesusr.com/ugd/99d1da_dc295c0897a74b5890dd016b9c8fa5b9.pdf?index=trueIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_71b060b734124314985c7494c5d6d537.pdf?index=trueIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_d13b239840a84768b5b44be764311f80.pdf?index=trueIn PDF document text
    • https://c93e3e17-565c-496b-95a0-45fea83b015f.filesusr.com/ugd/cd9bb8_7f941d8a128c4e3e90c8afa2b534e588.pdf?index=trueIn 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_off00015535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15535 5236 bytes
SHA-256: 788abbdd05b35811df0682330699454f9812947655109820cfa42c705a27da6d
font_01_sfnt_off000166f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166F3 12348 bytes
SHA-256: fbccccb582c55ddad7ac787f1eab96958288e862289758e33fb8b4c9a5834084
font_02_sfnt_off000190f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190F2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3