Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee5880015d4f39e…

MALICIOUS

PDF

85.1 KB Created: 2021-03-22 16:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fefbeff1c28c4d7fb2e62c91cf877b66 SHA-1: 8d8313790135ea3e525c65de101fd808f477db38 SHA-256: 9ee5880015d4f39e73edd2cbe875121e0b173547f33b1c76bcbceeaafb4458b8
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 0.9990

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://seumenha.ru/wix?keyword=what+plants+need+to+grow+worksheet+year+1 PDF link annotation
    • http://notdull-eng.online/viditagiwojarilukidusim8163.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/jfJigjj/communication_interpersonal_skills_ppt.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/kefaxelipubbln.pdfIn PDF document text
    • http://ru-payment.casa/sotesumuredinixirelovv2le.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/jDQehhe/ice_cream_cone_cupcakes_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/hpRjgsP/mofudimus.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/ropeweradekivan85j1t.pdfIn PDF document text
    • http://cookwellbakewell.com/dagepiwesolowuwetapefjiej9.pdfIn PDF document text
    • http://useporte.xyz/is_prisoner_b-3087_a_moviej7zj9.pdfIn PDF document text
    • http://copyright-help-report.com/79359981200adijv.pdfIn PDF document text
    • https://cdn.sqhk.co/lunosupi/zBiax2r/rokakiva.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/ihwieif/52392842466.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://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_025380aa4a834913aab1d7f17aca19fa.pdf?index=trueIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_d78bd736bb304788bce1852cff6bec5b.pdf?index=trueIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_1432df6bc4c843699f35de52673141d1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c035f7-6386-4c54-b28e-040565c58829/whats_another_word_for_few_and_far_between.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_1e95ffb07e294e45bdab135fb8faac9b.pdf?index=trueIn PDF document text
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_1e4515b671604307b8e5b7b5d095f9cb.pdf?index=trueIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_7bc36b2a82a747a79f2463ccd1997d6d.pdf?index=trueIn PDF document text
    • https://9d03b195-5c34-4993-8a23-519dd2bddccd.filesusr.com/ugd/9ac058_fc7a8c55d6254067931ef0b72dbb2cc8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df838a4-8beb-41f2-93cb-a7d3f8ad1c89/xagemelorav.pdfIn PDF document text
    • https://3d1db4d0-c196-4dd3-8d5c-bb108cafbd43.filesusr.com/ugd/479e38_c29422485d1c4b7fb2e6d132644365bb.pdf?index=trueIn PDF document text
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_f0a3aa66f8634a31b4b74828d454a73d.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_ce471f1e18ef4dc8a49b6e31225dbb7a.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_off0000ff14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 5284 bytes
SHA-256: c349428e0b77310473b4da3c53cc54b070625fe12f275834c5c4963eba50ca18
font_01_sfnt_off00011122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11122 12068 bytes
SHA-256: 7fbcd41de0404817657a400bd007c83dcb070e51e26011609da438620f2c54df
font_02_sfnt_off0001385a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f