Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2cef912aa29243…

MALICIOUS

PDF

77.8 KB Created: 2021-03-03 11:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 12b2fc20c5412eb1fdd23cca2aa4ea22 SHA-1: 5c772f14f43a710f15427680c801f75305028611 SHA-256: 1d2cef912aa29243dab1b947d83a166afbcf15027d12df96b159ddc1b88e949b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous embedded URLs pointing to external domains, suggesting a link farm or distribution network. The presence of embedded URLs and the PDF structure indicate an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/award?keyword=behringer+u-phoria+um2+usb+audio+interface+chromebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387052/normal_5fd6e6d82ba02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528959/normal_6032e55a46488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459162/normal_6022d847406e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409393/normal_5fdb28ea3f299.pdfIn PDF document text
    • http://supermagazforsale1.xyz/repemeniwl97yh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445868/normal_60342b7e979e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_603eed0e57cb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_5ff64db692990.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490132/normal_5fe52a508e266.pdfIn PDF document text
    • http://nutejujaxi.66ghz.com/ruwodutizolabila.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/feedback_form_after_presentationerh2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_60329ad6949b0.pdfIn PDF document text
    • http://fitdieta.com/best_rainbow_quotesirluu.pdfIn PDF document text
    • http://shtancircul.site/babua_kahela_rota_hai_dj_song09ji7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394077/normal_5fdf6da560fab.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/feseni/63221995780.pdfIn PDF document text
    • http://jegegapi.rf.gd/honeywell_security_system_manual_vista_20p.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/ala_baburao_dj_song_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/conor_maynard_not_over_you.pdfIn PDF document text
    • http://mewudupite.epizy.com/canon_eos_rebel_t5i_user_manual.pdfIn PDF document text
    • http://bavidoripo.epizy.com/adjective_clauses_esl.pdfIn PDF document text
    • http://nulukuduvi.rf.gd/20509521712.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_off0000f232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF232 5956 bytes
SHA-256: 75e174a2d1fcb208efe0c40afcfe63099f366daba2cb003c5cc8e92b95f4963d
font_01_sfnt_off0001065a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065A 10296 bytes
SHA-256: 1c04cf80af2a81b386b7e78c656c5bba3f1ed02254a4e18522aae89938dfe8b6

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