Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c56083c67ba9b43…

MALICIOUS

PDF

69.7 KB Created: 2021-02-26 14:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0c0cd2c54b6807b5b5a00bc0c6d1a432 SHA-1: ebb698651c8661b9ba04380385c77637fed20d01 SHA-256: 2c56083c67ba9b43d83e990f52fb4f88862697f6c98bb12145089c35bca80af4
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

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://xajibur.ru/strik?utm_term=maserati+granturismo+convertible+autotrader PDF link annotation
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/fd481f28317c3fb.pdfIn PDF document text
    • http://titoto.xyz/wokaziririrejixreusx.pdfIn PDF document text
    • https://vetaguluxidi.weebly.com/uploads/1/3/4/6/134656260/wabepilodolope-wogomema-nifunexafobonep-tidexagebek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_6013405feb907.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/1952418.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/dark_sky_background_hdfe4lw.pdfIn PDF document text
    • http://greatholl.com/bolanudajrhdx.pdfIn PDF document text
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/1b5b6.pdfIn PDF document text
    • http://sehq.xyz/calculus_ab_worksheet_1_on_limitsghmxp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409609/normal_5fe23ef92b031.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/donexovusut-veputowuzoga-zubejonu-lawinazenoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_5fda889330ed7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixixus.epizy.com/bogufowabewig.pdfIn PDF document text
    • http://desasivitusuzux.epizy.com/toshiba_dvd_recorder_dr410_manual.pdfIn PDF document text
    • http://gudinomid.rf.gd/the_rabbits_who_caused_all_the_trouble_theme.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/esl_teacher_lesson_plan_template.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_off0000d057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD057 5464 bytes
SHA-256: 6672f01f0b06104db8235db90e5c382a093f2168bb7dbdc2296ddfd1d111ea75
font_01_sfnt_off0000e2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E3 10940 bytes
SHA-256: 7e20b2cf47d23a91d622fbc2cc566ff01ba244b5df57ec269a0ab967392c6b01

Open this report in the interactive analyzer, or submit your own file for analysis.