Malicious PDF — malware analysis report

Static analysis result for SHA-256 447cb9fd2bb9bc15…

MALICIOUS

PDF

91.8 KB Created: 2021-04-11 05:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a6db9717191bae74eaae51257f139e7c SHA-1: 289ae9a480199a5312e0adf5bc9c1bc048e708d5 SHA-256: 447cb9fd2bb9bc1505a4314a00138585814d0d78f8f43b6a89f60ac0d7cee637
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing or malware distribution lure, masquerading as TV stand instructions. It contains a large number of external links hosted on disposable domains, a common tactic for SEO spam and malicious redirection. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or redirection to malicious sites via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=mainstays+parsons+tv+stand+instructions+pdf PDF link annotation
    • http://sayfelengs.space/96610926070ne9na.pdfIn PDF document text
    • http://ig-soft-team.com/90080477115o95b3.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/the_little_brown_handbook_13th_edition_online_freebc800.pdfIn PDF document text
    • https://jowozulabu.weebly.com/uploads/1/3/4/0/134013075/lofaniboven.pdfIn PDF document text
    • https://dumamigurox.weebly.com/uploads/1/3/4/3/134336195/c6f6b2fefaa9c.pdfIn PDF document text
    • https://gowutejuvotebap.weebly.com/uploads/1/3/4/3/134372770/sasolebaxudibo_renudajile.pdfIn PDF document text
    • http://winclean-shop.space/wabumupafemonopiferexoqlunq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466661/normal_606ce8ed60a67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_5fe7bc932b414.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463308/normal_5fefbd32eb372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_604a14013eaad.pdfIn PDF document text
    • https://zozijopese.weebly.com/uploads/1/3/3/9/133997316/gepozujagetezaz_magixivu_nogeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401518/normal_5feb4ce96d734.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/9345145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_60689c09f0627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_603f959a78452.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_cb0e8f8e59304bb7b9910a39e21c115a.pdf?index=trueIn PDF document text
    • http://wevabaxajube.rf.gd/zozuxo.pdfIn PDF document text
    • https://11e0ccb5-01dd-4757-ae93-f6f3b4f5ca32.filesusr.com/ugd/1a2ce6_46506553eb5649fdad1f3855b5421a36.pdf?index=trueIn PDF document text
    • http://mulotuzasokafo.epizy.com/gibebulepotowuwabizo.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_c17e75ae68cb4e76a8411af0928dae32.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_34f2ffa4655543f4aaaa955ddc94759f.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_off00011a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A80 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0
font_01_sfnt_off0001250e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250E 5284 bytes
SHA-256: ffbc1192fc33370ab37d9eee1699b1c1736d3841e01e221e967d1166cd301ff7
font_02_sfnt_off00013734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13734 12428 bytes
SHA-256: 04253896dcb75cbae9aca3c6192f7b7815deb51e2a1b12eba894743b4be66e59