Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a407b1c327456a4…

MALICIOUS

PDF

97.1 KB Created: 2021-03-17 20:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: be37844a2c243cd0410a8b0f8403c7b5 SHA-1: 56026613bc78c4a05f0f548c72f21e39d5606596 SHA-256: 2a407b1c327456a48d90eecbf4444e1f43a514a59e1773afee277c2bf121bd8a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://lozipotod.ru/123?utm_term=the+ethical+dilemmas+of+robotics+pdf PDF link annotation
    • http://sowopezamiw.medianewsonline.com/what_is_the_darkest_minds_available_on.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_5ffad5d6205b4.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/i1jdidd/super_cat_tales_2_kittens_location.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/eigchcI/free_download_lagu_wrecking_ball_miley_cyrus.pdfIn PDF document text
    • http://bazodifufibi.22web.org/inflammatory_back_pain.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470380/normal_601b6c7bef04e.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/cWWHb7N/crowded_house_albums_ranked.pdfIn PDF document text
    • https://jadowusirufire.weebly.com/uploads/1/3/2/7/132740355/1673265.pdfIn PDF document text
    • https://cdn.sqhk.co/mepofazobi/hjYif59/eva_popiel_kid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fe1a5e1eed04.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/djhGGha/jilutugupuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415951/normal_5fc9a56fb33c2.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/12000982710.pdfIn PDF document text
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/tususenopuvokuk.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/49073349585.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dozuxix.myartsonline.com/maytag_front_load_washer_filter_cleaning.pdfIn PDF document text
    • http://lisotabisalak.epizy.com/jakexatagidusanurito.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/josorirasitururu.pdfIn PDF document text
    • http://rivuwasiwitovud.rf.gd/emathinstruction_answer_key_free.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_off00014034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14034 5484 bytes
SHA-256: e6da956b46684cb4d664cdb50da7c5075b77543582dcee5fb9a109490255d849
font_01_sfnt_off000152a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A8 10672 bytes
SHA-256: afafd85044d2f554115153267eda01de08991b9be533f297315bbb1294de0982

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