Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92d7aade6ce2ebb…

MALICIOUS

PDF

38.7 KB Created: 2020-03-29 07:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 651d076332eb6066bb136c33450490d3 SHA-1: 4acc264380cbe78366ae4bc0dd88aa9306bca94a SHA-256: a92d7aade6ce2ebb4610a9af3307da323b75237eeb574a591a302d240230c527
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains a reference to 'The laramie project play review' and includes numerous URLs pointing to PDF files and HTML pages hosted on various domains. This suggests a link farm or SEO spam campaign, potentially leading to phishing sites or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://adsl-63-204-18-21.benefitplans.org/uploads/1/3/0/3/130313590/130313590.html#the+laramie+project+play+review PDF link annotation
    • http://napavalleybus.com/uploads/1/3/0/5/130538817/wosefilaravubuwow.pdfIn PDF document text
    • http://thirstingforlove.com/uploads/1/3/0/9/130969056/a3a52424.pdfIn PDF document text
    • http://classicpetroleum.net/uploads/1/3/0/9/130969817/8f3b42fef18.pdfIn PDF document text
    • http://alskitchen.net/uploads/1/3/0/3/130379341/c6f5581e5.pdfIn PDF document text
    • http://petrapsheet.com/uploads/1/3/0/7/130739363/5956968.pdfIn PDF document text
    • http://deals.pearldistrict.com/uploads/1/3/0/3/130313102/patetede-pufibidunubir.pdfIn PDF document text
    • http://mta-sts.mail.torontoallergygroup.com/uploads/1/3/0/5/130588778/3974674.pdfIn PDF document text
    • http://www.hdopoker.com/uploads/1/3/0/7/130775380/4139871.pdfIn PDF document text
    • http://www.thebibleadventureseries.com/uploads/1/3/0/4/130488970/4753454.pdfIn PDF document text
    • http://crimsonmba.com/uploads/1/3/0/2/130271245/17d771.pdfIn PDF document text
    • http://sta-66-99-58-216.ladse.org/uploads/1/3/0/4/130479312/8459865.pdfIn PDF document text
    • http://voipsip.net/uploads/1/3/0/8/130813366/2af8b5add4.pdfIn PDF document text
    • http://myfuturehorizons.com/uploads/1/3/0/7/130739073/dijonilitudubedusawo.pdfIn PDF document text
    • http://vancitypiano.ca/uploads/1/3/0/7/130740297/daguwup-lazidig-jusenanipozo.pdfIn PDF document text
    • http://acnewhyme.com/uploads/1/3/0/5/130551356/nulonufa_towuwisaden_kesokaw.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA3 8160 bytes
SHA-256: 98d2c7fe50177db77e2af1fad6bb6f1133d54b56ba6f000b3a8952d0d854ae1f