Malicious PDF — malware analysis report

Static analysis result for SHA-256 760efb865a1d13cb…

MALICIOUS

PDF

71.9 KB Created: 2021-01-27 03:46:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 92c2a2830234846d53cf6610f31a2d8e SHA-1: 5eb6b1f5f3fe06cb8701edf14b0e1396a6b20a32 SHA-256: 760efb865a1d13cb70bfa399931fa72d0e54aa181dad453f45c44e8c546b259c
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external websites, characteristic of a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://maypoin.ru/wb?keyword=baldi PDF link annotation
    • https://cdn.sqhk.co/bitaxukezor/jauiigj/32744175427.pdfIn PDF document text
    • https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/7566682.pdfIn PDF document text
    • https://ponozivodu.weebly.com/uploads/1/3/0/7/130775347/8947955.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/bggqwFO/dozezawobunitofabigor.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/fubuweno.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/Imjaied/98346681729.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/hbiiKhj/daring_destiny_story_choices.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/bahibij/417037004.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/diijjCg/1619027326.pdfIn PDF document text
    • https://cdn.sqhk.co/jifonakilux/ihifjcM/ultimate_wolf_simulator_2_apk_vision.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/tubupejevomo/39800978347.pdfIn PDF document text
    • http://zomimek.epizy.com/arjun_reddy_ringtone_free_background_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/65423442330.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/69449808560.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/80416199711.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_off0000d9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F8 5728 bytes
SHA-256: 2c4d45bdb1c3141a84092ac84c437081427b8ac2b94ba500fbcd6e04d0cee126
font_01_sfnt_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 10796 bytes
SHA-256: 7b1c305dca342659287ee10ac318c366298996ab493cb6478daf869b6cc86d04

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