Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c897707edb6b160…

MALICIOUS

PDF

88.4 KB Created: 2021-03-02 11:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 063429329e6a8f6c9e93448bb08c7098 SHA-1: c18a22bfac915637c7fa3ebcacee947ef675f703 SHA-256: 1c897707edb6b16027637b1cf698769358bc9a520fb0f71e6095d9ffe78e7f67
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one that impersonates a FedEx delivery notification, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of external URIs and the PDF structure itself are indicative of malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/award?keyword=fedex+drop+off+west+los+angeles PDF link annotation
    • https://cdn.sqhk.co/godezixibufo/hjhgehj/91847912040.pdfIn PDF document text
    • https://lujinelux.weebly.com/uploads/1/3/4/3/134361227/a99ae811475e20.pdfIn PDF document text
    • https://lujumibuxoze.weebly.com/uploads/1/3/5/3/135350241/laduf_nesetaga.pdfIn PDF document text
    • http://ogranicbio.space/how_to_reset_directv_genie_mini_remoteo2s6x.pdfIn PDF document text
    • http://junelizirigoroj.iblogger.org/data_structures_and_algorithms_coding_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/tinajugezepi/ZqhgtMb/water_marble_nail_paint.pdfIn PDF document text
    • https://borikalubir.weebly.com/uploads/1/3/2/6/132681749/tamadi.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/hcPcLjj/vemomaxulomurigujuke.pdfIn PDF document text
    • http://andyhongdigital.com/experimental_psychology_journals2bc8c.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/likadojivivofu/kexubapapevimukawilik.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/43217556171.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/phonological_awareness_games_for_older_students.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/87430926009.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/vidujolaluzub.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/kabezaturedinef.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_off00011df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF4 5324 bytes
SHA-256: a76b4b9c954be7a83c4603d7d8c1b26fd5c884ee856b2625d224411876b9b463
font_01_sfnt_off0001303f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303F 10608 bytes
SHA-256: d7e52cda2d71d218bb70fc797d50da426c9b63661f1ea404c39a50be7a603c50

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