Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab105b3360c2e5e…

MALICIOUS

PDF

66.1 KB Created: 2021-03-18 21:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0724affff73296a5cad67fef88baeff6 SHA-1: c03fea6e550207714392850fc6b3ca3da71f9f0f SHA-256: 2ab105b3360c2e5e9360f46c27258612651f82d3dd81d4591302315d3b4df563
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 0.9996

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://resalured.ru/123?utm_term=8085+microprocessor+addressing+modes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477155/normal_60251b65d7255.pdfIn PDF document text
    • https://begukuji.weebly.com/uploads/1/3/4/8/134880386/2619977.pdfIn PDF document text
    • https://muzuwetabez.weebly.com/uploads/1/3/1/4/131483468/lafiluzasig_vopodutoxomel.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/fbabe.pdfIn PDF document text
    • http://diguduv.iblogger.org/is_death_cure_the_last_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482188/normal_5ff8b9226649e.pdfIn PDF document text
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/3400834.pdfIn PDF document text
    • http://mekozeka.66ghz.com/titoje.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/mavasixinosatas_kefag_gekefadosizup_bidukixamox.pdfIn PDF document text
    • http://wizimesataw.22web.org/how_much_are_citizen_watches.pdfIn PDF document text
    • http://kulixebuvalafin.iblogger.org/warhammer_40k_8th_edition_detachment_roster.pdfIn PDF document text
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/c066d008213.pdfIn PDF document text
    • https://jipoditilab.weebly.com/uploads/1/3/1/4/131407274/gijaxelebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_602df2ec95132.pdfIn PDF document text
    • http://lazuvozesodot.iblogger.org/tofajerilusasegujeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_5fd32aa893a91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuwewabarabin.epizy.com/mcdougal_littell_geometry_2007_online_textbook.pdfIn PDF document text
    • http://taruxapajosavup.epizy.com/20771366909.pdfIn PDF document text
    • http://lizolejixo.rf.gd/gesomaz.pdfIn PDF document text
    • http://tipixerokofor.epizy.com/how_do_i_pay_my_dish_network_bill.pdfIn PDF document text
    • http://nelaxufap.rf.gd/flash_adc_converter.pdfIn PDF document text
    • http://fisejotigu.epizy.com/a_letter_name_whatsapp_video.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_off0000c6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BA 5808 bytes
SHA-256: f957d7af7003dd7bb13cd300d73b334d37436f706711cd21b99e1065fa50abde
font_01_sfnt_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 9584 bytes
SHA-256: 1a6d10433a98b14efc7d8b6a2b574ffb3fe83d1c1687ab974b98473f58699760

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