Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef1d97823957ace…

MALICIOUS

PDF

43.5 KB Created: 2020-03-23 16:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b2757e0dccdd2c5f35b9caa09234bb0b SHA-1: 5166bb5c56a6e4cf0e8d12b7b2e717b9c1d4e35e SHA-256: bef1d97823957aceaf244bd6ff488138fe6c4064cb96f3d8121d09a182412e9e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the URL http://urbanvertical.ca/uploads/1/3/0/6/130620613/130620613.html#4.2+kms+into+miles, which is also listed as an external URI. 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://urbanvertical.ca/uploads/1/3/0/6/130620613/130620613.html#4.2+kms+into+miles PDF link annotation
    • http://biologiadellanutrizione.com/uploads/1/3/0/7/130739026/7781326.pdfIn PDF document text
    • http://camelotk9.net/uploads/1/3/0/5/130588584/4567d3102fe7ee.pdfIn PDF document text
    • http://brunostippe.com/uploads/1/3/0/2/130272381/61287edaee75d.pdfIn PDF document text
    • http://momuniversity.org/uploads/1/3/0/6/130639629/dipojemif.pdfIn PDF document text
    • http://hkhairshop.com/uploads/1/3/0/3/130379145/torimabulida.pdfIn PDF document text
    • http://ellismgt.com/uploads/1/3/0/8/130813413/790ed77462d9258.pdfIn PDF document text
    • http://sitandgrin3.com/uploads/1/3/0/2/130270907/vobesok.pdfIn PDF document text
    • http://drake.best/uploads/1/3/0/6/130639841/5494550.pdfIn PDF document text
    • http://harmonfinancialgroup.com/uploads/1/3/0/8/130814579/ba393e1360e4a1d.pdfIn PDF document text
    • http://guidepostlegal.com/uploads/1/3/0/8/130873846/pofegikarizedun-fasofi-mevida.pdfIn PDF document text
    • http://www.t6ranchhorsesales.com/uploads/1/3/0/7/130738667/9999002.pdfIn PDF document text
    • http://www.adentagreece.com/uploads/1/3/0/4/130476172/2564894.pdfIn PDF document text
    • http://saintalbansbrentwood.org/uploads/1/3/0/5/130539340/ca8aa09eb01.pdfIn PDF document text
    • http://braaschlab.org/uploads/1/3/0/5/130551517/fapisezuxozixal_wiwexeba.pdfIn PDF document text
    • http://thefirststepisadoozy.com/uploads/1/3/0/4/130489431/ea4b610ff12.pdfIn PDF document text
    • http://finetick.com/uploads/1/3/0/7/130738762/jugaser-sibipisagejabij-kipozaxarir-pixufud.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: ellismgt.com 7 samples

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEF 8156 bytes
SHA-256: 60233b29795b85ae4084d8a6902cf59bdaeea6e2d46979be1e9e2d6b3d5cd7e1
font_01_sfnt_off00008b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8C 16100 bytes
SHA-256: 67cd3670ae6e342190c318dfdfd494d386a674b289d6b9f0c2dec60068b7ac9d

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