Malicious PDF — malware analysis report

Static analysis result for SHA-256 3146b95303eefa2b…

MALICIOUS

PDF

29.4 KB Created: 2020-04-14 04:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 5db35910785a6c3c7de59ce704d1f028 SHA-1: e28fb064909e3803c8f583efb49d0198ab2e0d8e SHA-256: 3146b95303eefa2b284b8eae23247a98203f42012febd76a4b573a42cb3d62b5
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or phish for credentials. No scripts were extracted, and the document body is largely unreadable, limiting further analysis of the specific lure.

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://avamoher.com/uploads/1/3/0/8/130874488/130874488.html#bar+graph+worksheets+for+grade+5 PDF link annotation
    • http://miatstarr.com/uploads/1/3/0/5/130589360/xipedenusujujagazir.pdfIn PDF document text
    • http://lwprojectsltd.com/uploads/1/3/0/4/130488924/6334125.pdfIn PDF document text
    • http://getgoldfish.io/uploads/1/3/0/7/130775744/kanowidezi-kakuvudakato-tezudalizelero.pdfIn PDF document text
    • http://bhmoffroadtestfacility.com/uploads/1/3/0/6/130603676/josugeta.pdfIn PDF document text
    • http://skunkrivercreations.com/uploads/1/3/0/9/130968962/8c73c4cbd9d7cb.pdfIn PDF document text
    • http://fullexposurephotography631.com/uploads/1/3/1/4/131438481/bf03053.pdfIn PDF document text
    • http://beyogaonline.com/uploads/1/3/0/7/130739233/4497815.pdfIn PDF document text
    • http://playercoaches.com/uploads/1/3/0/4/130477135/3306159.pdfIn PDF document text
    • http://morganadvisory.net/uploads/1/3/0/4/130483508/3384186.pdfIn PDF document text
    • http://wholistichealthwithroz.com/uploads/1/3/0/9/130969862/5654305.pdfIn PDF document text
    • http://olmcsauction.org/uploads/1/3/0/4/130483163/6515343.pdfIn PDF document text
    • http://alainanddanielle.com/uploads/1/3/0/5/130546354/2dee3f8d.pdfIn PDF document text
    • http://trueamericanbadass.net/uploads/1/3/1/4/131410939/5396994.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_off00004d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D83 7016 bytes
SHA-256: 0373efb3332b9f6ffaf7f0857ecff82fcf157d0a848d8b3d6e27c2f999a433a8