Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1e689239bdfe1d…

MALICIOUS

PDF

79.3 KB Created: 2021-04-02 22:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4bdff16f1baa7a4db3e64fab8fcd858d SHA-1: 0c46e01ea6b828e883fab5261c193b00701387b9 SHA-256: 8a1e689239bdfe1d6a4451284d1fb8b97dc949db182a5bf73c8e7d3fdacf8c47
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious, exhibiting characteristics of a phishing or SEO spam campaign. It contains a large number of external links, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Amway pdf catalogue' and 'wkhtmltopdf', indicating a lure to disguise the malicious intent. No scripts were extracted, but the extensive link farm and ML classification strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/wix?keyword=amway+pdf+catalogue PDF link annotation
    • https://cdn.sqhk.co/sowanigog/fIhghgW/madekawitanabugibumoduses.pdfIn PDF document text
    • http://zivudib.66ghz.com/tp-_link_archer_c2_user_guide.pdfIn PDF document text
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/reludenoli.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/cCijjdp/rudobavefibeguwew.pdfIn PDF document text
    • https://sozipufejelaj.weebly.com/uploads/1/3/4/3/134352325/8138738.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/2f2e3a82.pdfIn PDF document text
    • https://ruzovaberup.weebly.com/uploads/1/3/4/6/134651658/6b346c5.pdfIn PDF document text
    • https://zigeginuserepu.weebly.com/uploads/1/3/4/0/134041232/5e6b8c1.pdfIn PDF document text
    • https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/jupawolaxibafa.pdfIn PDF document text
    • https://butadagawonor.weebly.com/uploads/1/3/1/0/131070306/c6fe3097328a5.pdfIn PDF document text
    • https://vasirorikipik.weebly.com/uploads/1/3/0/7/130776585/tonojipexazi-bawedasa-paxigaxozi-wurixabatefix.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/jjfhjhi/best_deals_on_wheels_reno_nv.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/7ifHibG/mobile_legends_bang_bang_tier_list.pdfIn PDF document text
    • http://pipetopewuja.iblogger.org/formal_letter_template_word.pdfIn PDF document text
    • https://gojufoviwovefu.weebly.com/uploads/1/3/4/5/134515133/a8c3a60e89f2a8d.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwovado/HhdSh96/furniture_city_huber_heights.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zefupolegemawak.rf.gd/purisiwovezenevariv.pdfIn PDF document text
    • https://c9ecad83-e70d-4e71-84d8-0086c45344aa.filesusr.com/ugd/01a317_e570c348a4144f14a14a711237ce22fb.pdf?index=trueIn PDF document text
    • http://voruluju.epizy.com/madumuxinubamajejew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8dbc6e-ed41-4da0-958d-f4dd887b2ea4/xobiragidib.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_c8c4ef7b12034fc3bf29c9fc1225c891.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_c16fb9ca20ce4e4485804513d66e5b83.pdf?index=trueIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_76375a87f05446c1bf76b1962daa293b.pdf?index=trueIn PDF document text
    • http://wevopik.rf.gd/wazepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e56c54-386e-4b27-9bcf-e2866195219f/how_many_books_are_in_the_trials_of_apollo_series.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CE 5384 bytes
SHA-256: a448ee4034df7c282ef9f8bbed7c118e6577e0901d59f7f50babcd58ace1efbb
font_01_sfnt_off0000f42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 10640 bytes
SHA-256: 49b2dd3f4008c17584011df0e51b5b9cc00d40b3d2d33f71e0651813ba53ed3d
font_02_sfnt_off000118af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AF 16172 bytes
SHA-256: 96e06106e3006553386fba87c243c4a28b622411f61b38071404873282de63a9

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