Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb61a4aade2e8135…

MALICIOUS

PDF

75.1 KB Created: 2021-04-01 15:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: eefd69b506e7fab8a1c0ff85efbbd163 SHA-1: 96053fbb79c5e640eb733ac3b413512ce3d1f489 SHA-256: bb61a4aade2e8135a3614421036bae376c78a13e11b1f51799a0f93c81ec88e3
156 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 5

  • 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.
  • 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://midufefew.ru/wix?keyword=alabanzas+casa+de+oraci%25C3%25B3n PDF link annotation
    • http://fazejajogavu.medianewsonline.com/64918542775.pdfIn PDF document text
    • https://sifelinapekaw.weebly.com/uploads/1/3/1/6/131637019/83c2249bd676ee.pdfIn PDF document text
    • http://liketime.online/bosch_axxis_washer_user_guided3tvn.pdfIn PDF document text
    • http://neojust.ru/simple_painting_ideas_for_beginners_on_paper5rs56.pdfIn PDF document text
    • http://khareedforosh.com/37734816557sl8i1.pdfIn PDF document text
    • http://bilet-pdd.site/75599099334yg9xh.pdfIn PDF document text
    • https://zuwufapiju.weebly.com/uploads/1/3/5/3/135348861/7838159.pdfIn PDF document text
    • https://puzifisabu.weebly.com/uploads/1/3/1/3/131378936/a30bdb60d.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/pudopobe.pdfIn PDF document text
    • http://wafolifinibi.22web.org/44816558541.pdfIn PDF document text
    • http://getveran.site/dagidilewumawukufz9q4.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/vebenok/calendrio_mensal_2020_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/bernina_artista_170_original_price.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/pudejoloxa.pdfIn PDF document text
    • http://gemawinikifiv.myartsonline.com/13782185507.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/nmc_guidelines_breaking_bad_news.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/80141950797.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/neil_degrasse_tyson_literary_agent.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/what_are_the_three_types_of_textile_fibres.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/how_to_become_a_better_leader.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/fannie_mae_underwriting_guidelines_2019.pdfIn PDF document text
    • http://koxogulu.rf.gd/robojage.pdfIn PDF document text
    • http://paluluw.epizy.com/matlab_linspace_2d.pdfIn PDF document text
    • http://rezumasalimod.epizy.com/79519663283.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/50843967937.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54C 5248 bytes
SHA-256: 37bd11a2554694e960d1ed19b9d41327f9246750d76afb43f09688a2eee8849e
font_01_sfnt_off0000f6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 11748 bytes
SHA-256: 9b0cf610c9e5429844ca29b53934a38e68ffe9c5bd55ba2d1b425591ad32e5c9

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