Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ae8465d639116e…

MALICIOUS

PDF

80.4 KB Created: 2021-05-03 21:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f3971ec0d53ebaf987d0ef2bbaf2c25a SHA-1: 507667d9dc692b5c3c3c27367f7ae7eb4c5a228f SHA-256: f1ae8465d639116ed117c9375a88e0e2b013b5e4e5327bc655ea69da096b4f7f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://druttle.ru/strik?utm_term=indian+art+history+congress+guwahati PDF link annotation
    • http://aslixan.com/zigimu5zgg8.pdfIn PDF document text
    • http://epaytds.xyz/dutudazibajegiwiparp99dh.pdfIn PDF document text
    • http://pushbiz.fun/how_to_fix_a_ti-83_plus_graphing_calculatoryitbp.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/xovibbjjww.pdfIn PDF document text
    • http://italiahot.fun/85741218955vsdb4.pdfIn PDF document text
    • https://lafuxekezijunu.weebly.com/uploads/1/3/1/4/131406487/3032136.pdfIn PDF document text
    • http://nasporte1.fun/bofetisozz6arv.pdfIn PDF document text
    • http://dedaruk.scienceontheweb.net/pugaxakep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401973/normal_6008f179e332b.pdfIn PDF document text
    • http://govnosiakxws.online/the_crucible_act_1_plot_pointsxacqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6018450b85711.pdfIn PDF document text
    • https://nofojivebot.weebly.com/uploads/1/3/2/7/132740499/dobato.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/gemufuzesixo.pdfIn PDF document text
    • http://findattime.com/mavekijemeroxipefotosiwipl2yvk.pdfIn PDF document text
    • http://itayoga.space/57814305625roc2p.pdfIn PDF document text
    • http://lifegirls.site/suzavukapasajubenuw8kbt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_604ec169c3d7f.pdfIn PDF document text
    • http://teksalle.xyz/bifodefz1gac.pdfIn PDF document text
    • http://keepqifi.site/the_magicians_wiki_aliceuvjdg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_6012b0eb45546.pdfIn PDF document text
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/6438721.pdfIn PDF document text
    • https://ritefebeg.weebly.com/uploads/1/3/5/3/135316582/627144.pdfIn PDF document text
    • https://mofutobanu.weebly.com/uploads/1/3/1/3/131383854/6579607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gizogorofu.onlinewebshop.net/almost_is_never_enough_piano_notes.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/baxopuvujeti.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_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 5300 bytes
SHA-256: c6df1d5b82f8241f854afe395d816022053b804e5c550522ee1583fdda90b308
font_01_sfnt_off0000f9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E4 10500 bytes
SHA-256: 92926e386e8107b29a0162953912df49a37a57bc601e9d815894055e43bcdc03
font_02_sfnt_off00011e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E20 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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