Malicious PDF — malware analysis report

Static analysis result for SHA-256 804029ad32c13714…

MALICIOUS

PDF

35.2 KB Created: 2020-05-16 04:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 560abb7e0db33ed2648937eb35890957 SHA-1: e1089968bfbabc20188dc00697685eea9e40f870 SHA-256: 804029ad32c1371479640d01930728cae46bfb34e77f4d3cd6496bd741ea1b5f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, reinforcing the suspicious nature of the embedded URLs. No scripts were extracted, and the document body content is largely obfuscated, making it difficult to determine a more specific attack pattern beyond the link farm activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://icelandbeyond.co/uploads/1/3/0/2/130273576/130273576.html#grilled+flank+steak+nutritional+information PDF link annotation
    • http://blackoakfamilyfarm.com/uploads/1/3/0/7/130739783/lemip.pdfIn PDF document text
    • http://muthacluckaz.com/uploads/1/3/0/6/130639181/lepizilefivo.pdfIn PDF document text
    • http://captaingoogoo.com/uploads/1/3/0/5/130540063/xelam.pdfIn PDF document text
    • http://laurajanematthews.com/uploads/1/3/0/9/130969791/jerefelek.pdfIn PDF document text
    • http://reedmachine.net/uploads/1/3/0/4/130483413/lanakilit-turoberidixukut-kimuvob.pdfIn PDF document text
    • http://indyspotlight.org/uploads/1/3/0/2/130289623/8339140.pdfIn PDF document text
    • http://macdonald-designs.com/uploads/1/3/0/4/130489019/9181128.pdfIn PDF document text
    • http://healymirkovich.com/uploads/1/3/0/5/130543353/4604954.pdfIn PDF document text
    • http://ofcstylest.com/uploads/1/3/1/3/131381374/ed9364b40d4921.pdfIn PDF document text
    • http://sm-eb.de/uploads/1/3/0/5/130551463/e54d0541cd62c.pdfIn PDF document text
    • http://jgriffithwriter.org/uploads/1/3/0/6/130621552/7953426.pdfIn PDF document text
    • http://mouseholefish.com/uploads/1/3/0/7/130739152/zurapuzaxijomu-xaremun-mufude.pdfIn PDF document text
    • http://acquestnorthwest.com/uploads/1/3/0/5/130544043/50c56b18.pdfIn PDF document text
    • http://forestranchca.org/uploads/1/3/0/6/130639605/9286153.pdfIn PDF document text
    • http://thunderbirdsfoundation.com/uploads/1/3/0/4/130483153/jefafojeg_vixovijilu.pdfIn PDF document text
    • http://theamazingtruth.com/uploads/1/3/0/7/130739557/megot.pdfIn PDF document text
    • http://journey2wholeness.net/uploads/1/3/0/6/130604411/9500642.pdfIn PDF document text
    • http://ccsells.com/uploads/1/3/1/3/131379420/67e469.pdfIn PDF document text
    • http://mkebookscoach.com/uploads/1/3/0/7/130738658/guwuvikokokasawara.pdfIn PDF document text
    • http://genxlocal.com/uploads/1/3/0/8/130813550/wusalet.pdfIn PDF document text
    • http://prohaie.net/uploads/1/3/0/3/130313803/6513014.pdfIn PDF document text
    • http://arielleschiano.com/uploads/1/3/1/1/131164437/26778.pdfIn PDF document text
    • http://belindawabelo.com/uploads/1/3/1/0/131069923/d12a07b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

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_off00005ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC2 9932 bytes
SHA-256: ef7d098797b45082ae3bd5097a64535fc286f8fe437576f2c54cd247b1bea65e

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