Malicious PDF — malware analysis report

Static analysis result for SHA-256 30633eed52bb5b84…

MALICIOUS

PDF

82.8 KB Created: 2021-02-17 18:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a7cd03359bb14c2b8913d65e12e51802 SHA-1: dd52a89bf9a597a5b7b222d16f6c6c9524862c6c SHA-256: 30633eed52bb5b84c64fc00770b798a6f1b1b0bfb581536a5f982d6af20e2494
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains a significant number of external URLs, many hosted on disposable domains, suggesting an attempt to distribute malicious content or conduct phishing. The primary attack pattern involves leveraging these links to redirect users to potentially harmful 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://jottigo.ru/strik?utm_term=best+vegetarian+cookbooks+2020+australia PDF link annotation
    • https://cdn.sqhk.co/xogudililavo/Aticgjw/32742898782.pdfIn PDF document text
    • https://cdn.sqhk.co/peposusuwi/cgjzdij/bodukipeluzepifolevuludeg.pdfIn PDF document text
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/fijakeferajola-zipobikebolosi.pdfIn PDF document text
    • https://sobasoje.weebly.com/uploads/1/3/2/6/132695832/201d09d40aefdc4.pdfIn PDF document text
    • http://hookup154.site/toxekilujaxunozuxoru9ps.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/7681016.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/agc953E/puxinixokofotami.pdfIn PDF document text
    • http://top-salez.site/time_worksheets_grade_3_word_problemsyxmk8.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/jacv5je/super_car_racing_multiplayer_apk_pure.pdfIn PDF document text
    • http://giveaway2020.info/bamusaguraxasamapowanedlubmh.pdfIn PDF document text
    • http://italywow.info/balu_movie_naa_songsd78o4.pdfIn PDF document text
    • https://kotepavugenufe.weebly.com/uploads/1/3/4/5/134592782/2e7a936f21c7.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/informations_bfmtv_directlux7z.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/gjidhck/terminator_genisys_future_war_mod_apk.pdfIn PDF document text
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/tekutu_tojule.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/gezizefefififa/74035451267.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 5552 bytes
SHA-256: d5597c19d071d62ef6d35926d2f22c1eb2186c5f4c1e51dc1933f2637b9dc2dd
font_01_sfnt_off00011935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11935 11004 bytes
SHA-256: 092f5c683751267eb1edc9cf0a81014f04d5ff3b0c52c8d609b37e5c5bdd209b

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