Malicious PDF — malware analysis report

Static analysis result for SHA-256 d918164b9a85eb72…

MALICIOUS

PDF

78.5 KB Created: 2021-03-27 09:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 401d50214b7d4b5bdf8de79c246884b4 SHA-1: 8e4ffe5a7c205f049e0ac1bb3a9d2ae23b3777d5 SHA-256: d918164b9a85eb72dbdc4c21107a3ddece699e4f0975de6c5b7368bf0456e884
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 0.9991

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://ponafet.ru/wix?keyword=honeywell+th8320u1008+installation+manual PDF link annotation
    • http://confirmyourverifiedbadge.com/what_is_a_wake_for_a_dead_personzlyi3.pdfIn PDF document text
    • http://leopards.space/king_lear_act_1_scene_4_summaryqcu23.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/puvodaf-mobujos.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/2495074.pdfIn PDF document text
    • https://gikilona.weebly.com/uploads/1/3/5/9/135966600/5197636.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/4db9595.pdfIn PDF document text
    • http://pokypka.xyz/how_can_you_get_rid_of_a_cystic_pimplewrz9r.pdfIn PDF document text
    • http://quickpapp.online/kabaduranoxegadebalaypcg.pdfIn PDF document text
    • http://spoonnumberone.xyz/kaspersky_antivirus_offline_full_version_free0iu63.pdfIn PDF document text
    • https://makirogu.weebly.com/uploads/1/3/0/9/130969002/zenekifofolojuj.pdfIn PDF document text
    • http://vykupavto54.ru/facilities_management_budget_templates9ph0.pdfIn PDF document text
    • http://mesretly.xyz/zatefiwigogakax42bd1.pdfIn PDF document text
    • https://tazabojadikeze.weebly.com/uploads/1/3/4/6/134648043/c76d5e4df0.pdfIn PDF document text
    • http://iblack.space/the_heart_of_yogavxas5.pdfIn PDF document text
    • http://usechambre.xyz/somavifojuxudeparemotubalo9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_d672beee4c8f4f2ab86d33cb02dee18b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cdef73d-4f6f-4958-b8eb-36c83cb20d88/is_26_too_late_to_start_a_career.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0858498c-74e2-4bc9-b1ea-b01ce442f108/what_is_feminist_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d19ed1-800e-4836-b3f4-406cebcc74af/why_did_the_us_want_pro_american_ideals_in_latin_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a07baed-098e-4457-8701-dc3d0cae0e9b/zuveropilegipaluderamali.pdfIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_c34aef38c94249e9addb57bd110b7709.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ebb887-bffe-43d6-a349-d0e06a161469/how_to_fix_a_ge_microwave_door_handle.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_6690267362e840c285d9ddb7fa0f4ed9.pdf?index=trueIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_218255e5f31c4c79a06dd8068868bda8.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 5668 bytes
SHA-256: 8ad1cae018a4abca6dc17a50c4f0b9f540c2d3791962a94e30619f2887bbe059
font_01_sfnt_off0001046f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 11424 bytes
SHA-256: 1bba743439d1c5450b0f81f2ed59da32a348821ab9edcabf5c68d977ae5c75ef