Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1822b8d590166a…

MALICIOUS

PDF

80.3 KB Created: 2021-04-01 09:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1a6049af9f41e8da44f2299581c30b39 SHA-1: 7533cbb42f21b4520bda884079085bbd8896ba47 SHA-256: 1d1822b8d590166adf818e3eedb1fef2fea116cfcfa7b7e5d3b82a6a10356a4c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

Heuristics 5

  • 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 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://druttle.ru/strik?utm_term=trane+xr14+review PDF link annotation
    • http://proita.fun/megipiwetuno4q.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/ehiieDn/walking_dead_michonne_episode_2_guide.pdfIn PDF document text
    • http://temilops.xyz/thompson_center_black_diamond_owners_manualbiulo.pdfIn PDF document text
    • http://bijowuxupolapi.sportsontheweb.net/73250692168.pdfIn PDF document text
    • http://byseles.xyz/33865599218i2odm.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/jiehfih/archer_season_11_hulu.pdfIn PDF document text
    • http://barodowo.iblogger.org/6205418217.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/3gf44id/85427963326.pdfIn PDF document text
    • http://rabisoluvilava.iblogger.org/naruto_shippuden_ps3_games_free.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/19809914577.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/vepurumu.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/why_did_texas_almost_fail_as_a_spanish_colony_dbq.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/geidD9H/royal_defense_king_mod_apk_revdl.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://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_e93aef2e40f5411c85ba60ec9520c4f0.pdf?index=trueIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_fb82997fc842475da56e6e984e2f2d85.pdf?index=trueIn PDF document text
    • http://dijovoxokad.rf.gd/73342690431.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_915bffe17eae49828799fa73a2b98ad8.pdf?index=trueIn PDF document text
    • http://rokopuma.epizy.com/juvepunifafozezel.pdfIn PDF document text
    • http://vaguxupinirulop.epizy.com/51966011578.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_6992299428364ed982ea31fb3c2af366.pdf?index=trueIn PDF document text
    • http://pamanivu.epizy.com/zelodijuvoweluzepubag.pdfIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_1edac230684a47fdb42af9c51bf68089.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_off0000efc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 4376 bytes
SHA-256: 792296857dc60a46e50a0fb642d7939b295378c5ea26c0893509d94e7d8be715
font_01_sfnt_off0000feac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAC 11704 bytes
SHA-256: 778dcde04152c41261c9e753c8c3cc486ad54e52369d44a56c4bd501e0ee09f1
font_02_sfnt_off00012638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12638 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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