Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d4e098b828dd6a…

MALICIOUS

PDF

82.5 KB Created: 2021-03-18 15:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e6c4a2708267bb2f86f78d804d7a1a6e SHA-1: 9e66fdfeecc4e2b84baec3042864c1781db7ea40 SHA-256: 62d4e098b828dd6aa66b3b6bc0e8fad6e624e2eed66f390f10e871aedb4e32b7
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of embedded URLs and the overall structure point towards an attempt to lure users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=logitech+extreme+3d+pro+review+2020 PDF link annotation
    • https://rirudelibuwa.weebly.com/uploads/1/3/1/6/131606594/9af0a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5fd0af77ee437.pdfIn PDF document text
    • https://javetepamez.weebly.com/uploads/1/3/0/8/130814931/bukajirovesog_jobusafozatama_gadifofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456666/normal_603ebbc3bab4c.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/bojezokewuvimib.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/2865098.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/jitugufivufivomi.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/2622887268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_6023453386f5e.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/wozikegadekafi-motuzexajasixen-jofam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_6011fbff957ce.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/vubagudirumezaw.pdfIn PDF document text
    • https://tarezusubem.weebly.com/uploads/1/3/5/3/135386237/222a49f7315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_6a29e6aa75ee47f0b236fb032354019d.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_8d5bedc67dab48d1a21e6f38b55473b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba73b08c-44b3-4e37-bbe5-38b755171f1f/dedikerelap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0207ca-2e30-4f75-9f81-abf68d1f8b6e/39664961174.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/53300846686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2553ced-a896-4598-8051-7b4cb7a20533/patternmaster_choke_tube_for_stoeger_m3500.pdfIn PDF document text
    • https://b40f07b9-a98f-42b6-a6e2-5dc2c82ebb0e.filesusr.com/ugd/e949ea_b3682f3233034cdda315427713d5d3a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e05560-8e2f-4e74-85da-79afe51d3cde/how_much_does_a_2020_mustang_gt500_cost.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_5e88e5576d0148a9876398178fb5c6fe.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_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 5664 bytes
SHA-256: b6482d176ba8fb50dd9630abb300cce38dba8aecbb84b5d07c5da066ee7a8a28
font_01_sfnt_off0001150f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150F 11756 bytes
SHA-256: a42b042c58890f10c82e480524d0a99750c71cdaad4ceccc9ea29a3400400d86