Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a14b9e49fc51c0f…

MALICIOUS

PDF

45.6 KB Created: 2020-04-06 03:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 4ca97eae02d42e555664ea73275cc70d SHA-1: 1e7b641fd4e234ec2756d21384432387f0f08ddf SHA-256: 1a14b9e49fc51c0f828d1ba036ab64f940b043882d296635e6156008e7fc50d0
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. The document body text is garbled, but the presence of multiple URLs suggests a lure to external content, potentially for SEO spam or to host further malicious payloads. No scripts were extracted, limiting the ability to determine specific malicious actions beyond link redirection.

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://cutlovelee.com/uploads/1/3/0/5/130545742/130545742.html#tinta+para+pintar+cal%C3%A7ados PDF link annotation
    • http://nccuallpass.org/uploads/1/3/0/6/130620435/bujujuzuvobetum_waxaloseras_nakokutoxikeb.pdfIn PDF document text
    • http://offishalgear.com/uploads/1/3/0/7/130738755/getazuves-robirulapugise-zukidumimurulo-goviwag.pdfIn PDF document text
    • http://dippedbytoria.com/uploads/1/3/0/7/130775259/2395812.pdfIn PDF document text
    • http://thevillagetoyshare.com/uploads/1/3/1/3/131379940/4705525.pdfIn PDF document text
    • http://luciddreamquest.com/uploads/1/3/0/5/130589032/9407036.pdfIn PDF document text
    • http://gothic-flicks.com/uploads/1/3/0/2/130288551/b26cbf21f0b7ebe.pdfIn PDF document text
    • http://materdeiirishfest.com/uploads/1/3/0/4/130435813/watiduwoj.pdfIn PDF document text
    • http://autismparental.com/uploads/1/3/0/3/130313196/gupiluluw.pdfIn PDF document text
    • http://livingthecreativelifestyle.com/uploads/1/3/1/3/131383619/3372629.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: gothic-flicks.com 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000676e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676E 9944 bytes
SHA-256: 9eec8aaa517084d02f952c2e9dae892b7fbe7bcb1e985db8664653b8c7f49f92
font_01_sfnt_off000088a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A7 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea
font_02_sfnt_off00009210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9210 16088 bytes
SHA-256: a9a0cbdd47af2ea2cff5a4bf325ba0f4e4018825c54b81399ff3f9505b21a896