PDF static analysis report

Static analysis result for SHA-256 d56cb4130a233427…

SUSPICIOUS

PDF

37.3 KB Created: 2020-04-07 14:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 0f440bfedbefbb674fb0af26e7b1c057 SHA-1: bb8d53f2950ba90a5643ce381b7cc00bdd8f535e SHA-256: d56cb4130a233427427fffb97073541ef8f082303d694c2c33dc37c5bc0e6735
36 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with the primary one being http://lykkenkommerindefra.dk/uploads/1/3/0/7/130738503/130738503.html#comlex+to+usmle+conversion+formula. This URL, along with others, suggests a phishing or credential harvesting attempt disguised as relevant information. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. No scripts were extracted, so the attack pattern is inferred from the document's content and embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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 http://lykkenkommerindefra.dk/uploads/1/3/0/7/130738503/130738503.html#comlex+to+usmle+conversion+formula PDF link annotation
    • http://rktreks.com/uploads/1/3/0/6/130621780/e877ca.pdfIn PDF document text
    • http://lifteens.com/uploads/1/3/1/0/131070190/lozuka.pdfIn PDF document text
    • http://yogalifesf.com/uploads/1/3/1/3/131382955/bf8906ff22b.pdfIn PDF document text
    • http://aancarpenter.net/uploads/1/3/0/2/130289431/xawos.pdfIn PDF document text
    • http://solvemytrainingneeds.com/uploads/1/3/1/3/131379033/6360386.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000681b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681B 8552 bytes
SHA-256: f3d163c52df17196d40719d9b613ebe0931f9137a4517edc99cb48d895882588

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