Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6b147ffc3902d0…

MALICIOUS

PDF

38.2 KB Created: 2020-03-30 03:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e34e543d9a080edaa86bd3749b48dd76 SHA-1: 588a19dab2d84ad41d467822aa8333561575a2c3 SHA-256: ee6b147ffc3902d07ba38d59b093de808520c3b2433afa5b7caede7fba0ede3a
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, many of which point to other PDFs hosted on similar domains. The document body, though partially corrupted, contains a URL that appears to be a lure for information related to Mexican national identity. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic suggests a link farm designed to distribute malicious content or phish users. 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://74-123-73-159.mgwnet.com/uploads/1/3/1/3/131384300/131384300.html#identidad+nacional+mexicana+historia
    • http://binghaoy.com/uploads/1/3/0/6/130639539/saronumofa.pdf
    • http://teamoromia.com/uploads/1/3/0/8/130813639/f46e77dde5689.pdf
    • http://shoppingwithshannontoday.org/uploads/1/3/1/1/131164223/2e587e6e2f2aa13.pdf
    • http://opti-illusions.net/uploads/1/3/0/9/130969044/053f50e4d4e8c37.pdf
    • http://dangithurts.com/uploads/1/3/0/6/130621362/88710506.pdf
    • http://richardsonlegalpllc.com/uploads/1/3/0/9/130969059/bugukovexozo.pdf
    • http://seamossorganics.com/uploads/1/3/0/7/130739986/xopibopo-fesowuza-vowewik.pdf
    • http://alicevherrera.com/uploads/1/3/0/7/130774965/6923242.pdf
    • http://drivingcommunication.com/uploads/1/3/1/3/131382700/vaxune_zisogi_tixowasadusok_zeroralubemuno.pdf
    • http://myoquinn.com/uploads/1/3/1/1/131163751/2605168.pdf
    • http://snappyz.com/uploads/1/3/0/9/130968981/buvunekozure.pdf
    • http://instructional-resources.com/uploads/1/3/0/2/130287972/db4b60a6b8b1e2f.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_off000069f4.bin
fc95be24bded6e52791fc78c48b7f3389451a7e1c1bb9f082eb13fd223a13c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F4 8832 bytes

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