Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c120115c5a00f07…

MALICIOUS

PDF

38.3 KB Created: 2020-04-11 03:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4cc61195d7576eb9ea9da0df302a4d1c SHA-1: e6453d6815f4c4a266f0c42a724c1eee7ace2889 SHA-256: 5c120115c5a00f072de93a3b1c98373c3c921e1c941e2dbe947c46aeb334f50b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, http://advance-it.net/uploads/1/3/0/8/130814246/130814246.html#defined+and+undefined+terms+in+geome, is also present in the document body. This suggests the document's purpose is to redirect users to a network of linked content, potentially for SEO manipulation or to host further malicious payloads.

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://advance-it.net/uploads/1/3/0/8/130814246/130814246.html#defined+and+undefined+terms+in+geome
    • http://postal-creations.com/uploads/1/3/0/2/130289601/7904469.pdf
    • http://axistenceoutdoor.com/uploads/1/3/1/4/131454352/8320b9bb0.pdf
    • http://easynailswithdawn.com/uploads/1/3/1/3/131384015/pexurawopukukevi.pdf
    • http://ciggysound.com/uploads/1/3/0/6/130604304/ketoxugirefigipipal.pdf
    • http://jidaskinandbodycare.com/uploads/1/3/0/2/130287842/878225.pdf
    • http://okk.world/uploads/1/3/1/1/131164294/3536709.pdf
    • http://attainit.com/uploads/1/3/0/6/130621106/4788510.pdf
    • http://weltziensong.com/uploads/1/3/0/6/130620792/6f90ae.pdf
    • http://otaracommunitylawcentre.com/uploads/1/3/1/3/131378816/993dd2a.pdf
    • http://firedogpizzaco.com/uploads/1/3/0/8/130874639/1745766.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e68.bin
1d0077f1d7d41da31c2e1959194afd23c147ae5563588c73045dd9834ab8465a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E68 7376 bytes

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