Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb629e63e5c0bb9d…

MALICIOUS

PDF

80.5 KB Created: 2021-04-05 04:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d7bc9346c218f34d2b529269a87a21ec SHA-1: 596e3498a6a3583387bcd858256885185e9a07b5 SHA-256: eb629e63e5c0bb9dd0874b89a288b415e88d67f5ebbc6b58e2ec0299f3bbe2de
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 0.9992

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://mezovuduw.ru/aws?utm_term=where+do+dapple+dachshunds+come+from PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446259/normal_606300776b783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477910/normal_6019aceca4061.pdfIn PDF document text
    • http://sazasebum.iblogger.org/waxepamaximab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5fd17cccede7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_6038302fe4fc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529977/normal_600763593a32b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/93641198961.pdfIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_7690526e5d0c42ca9e51b5e22af2e3cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c79a43c9-a7bd-43bd-aadc-4e78451fe046/wiselini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/492e4548-734c-4f2b-a902-351a244f00c0/whitfield_pellet_stove_control_board_flashing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec8ab76-9235-4e10-8157-7abfe198da41/36758558607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393947a7-be7c-437e-a146-00e26cbbb823/87464280659.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/90654301195.pdfIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_0be31fb1143645679ba58e2f9f5f289c.pdf?index=trueIn PDF document text
    • https://cfae799c-d04a-4395-b2c2-700dffd2ed5c.filesusr.com/ugd/15504a_5ed588f50bf94127893ca79cbeeae05b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c975cf-4d99-40bc-9215-cb891a10b704/dunuvinimisivelapukusonid.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/how_to_scan_baofeng.pdfIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_c40b1bc8b425424f9789ec772f570973.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b95895-23a5-4ab9-8f8b-5bd1454229de/motorola_sb6121_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13dae242-f7b3-4c03-90b8-4a4ec7b9f9d3/7910309527.pdfIn PDF document text
    • http://bidasumibave.epizy.com/84413438746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b61db9fb-166a-4a34-9c9b-2a19ba9560dd/dd_battle_map_grid_size.pdfIn PDF document text
    • http://fabibupotiliba.epizy.com/jet_airways_labour_dispute_case_study.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 5408 bytes
SHA-256: 04588de3df2f622094df2e90ed47e341d218882d151c37e6bb7ff6edc272b7e9
font_01_sfnt_off00010ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE0 11036 bytes
SHA-256: 414128e37f546cfab33adfe643c0c6db045c6fa7ba55b8431999a2ba67082a85