Malicious PDF — malware analysis report

Static analysis result for SHA-256 64508ce60f9a4336…

MALICIOUS

PDF

47.5 KB Created: 2020-04-13 08:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f94b8c04d508e4829f7d62ada048047f SHA-1: 69d98c3eb3c9b461cff06296e85e2e499b54b056 SHA-256: 64508ce60f9a43366133ee2212a69a5f67cfa023857d60ab13c29849c66997bd
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm or SEO spam, embedding a large number of external URLs. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a potential attempt to manipulate search engine results or redirect users to malicious sites. While no scripts were directly extracted, the presence of numerous external links suggests a pattern of directing users away from the document to potentially harmful content.

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://4angelstshirts.com/uploads/1/3/0/4/130483067/130483067.html#batallas+en+el+desierto+resumen+capitulo+9
    • http://ridgefieldpickleball.info/uploads/1/3/0/5/130588511/rafopajig.pdf
    • http://end-labs.com/uploads/1/3/0/5/130588333/jewaforuxowem-dorovodukufexo-zujaxutusigu-gitiloradur.pdf
    • http://welcomehometoatmore.com/uploads/1/3/0/8/130814014/355ddb7.pdf
    • http://hiltonheadchurch.org/uploads/1/3/0/4/130476318/ruvugu-pikox.pdf
    • http://eracook-demo1.com/uploads/1/3/0/2/130291545/fonulovov.pdf
    • http://tdforus.com/uploads/1/3/0/5/130588493/6768502.pdf
    • http://vietnamtourist.org/uploads/1/3/1/3/131384789/bacedcd9aa.pdf
    • http://fwmcreations.com/uploads/1/3/1/4/131437833/c954303ea.pdf
    • http://sattvayogaatx.com/uploads/1/3/0/6/130620919/dutiko_dupajezev_tosemufukiju_wikaraj.pdf
    • http://loveyourlifenomatterwhat.com/uploads/1/3/0/5/130543640/pexexuz.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aae.bin
4552290bae0f91b2cc3e7ebe8d4d91c32c1bcf74172e498717f6c69834bc8f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAE 8880 bytes
font_01_sfnt_off00009aec.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEC 16036 bytes

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