Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d05c5e54152affc…

MALICIOUS

PDF

39.2 KB Created: 2020-03-15 05:48:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fcbbe86044f33b5a08950e6c65e2d27b SHA-1: cb984dfd57ca45ec9e905fc073256d34ea09e92e SHA-256: 0d05c5e54152affc2e95fc6caca0fc143297d5aee0ebca54caa7f391794c3e98
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, suggesting it is part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to a "cooking academy android app" and references to wkhtmltopdf, indicating a potential lure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm or redirection scheme.

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://qcukm.bpmtc.com/uploads/1/3/0/6/130640102/130640102.html#cooking+academy+android+app
    • http://www.mgzlaw.ca/uploads/1/3/0/4/130489152/serimojelatufu.pdf
    • http://tieagele.com/uploads/1/3/0/7/130738708/josegiwif.pdf
    • http://thisworldofechoes.net/uploads/1/3/0/7/130739162/mixemavisanexomitum.pdf
    • http://www.clarkcgroup.com/uploads/1/3/0/4/130476751/e717074718.pdf
    • http://samuelpluck.com/uploads/1/3/0/7/130775252/zaxumof.pdf
    • http://www.thesoftpinkfir.com/uploads/1/3/0/9/130969363/8876519.pdf
    • http://toprestaurantreviews.com/uploads/1/3/0/4/130435619/1012770.pdf
    • http://alvinnazarene.org/uploads/1/3/0/2/130289583/3f15104fdbbee3.pdf
    • http://ssouzaspainting.com/uploads/1/3/0/4/130491001/buvuvisipelofebisim.pdf
    • http://taxi-world.co.uk/uploads/1/3/0/6/130639766/167917.pdf
    • http://tigwallace.com/uploads/1/3/0/8/130814060/2921898.pdf
    • http://chermsidefitness.com/uploads/1/3/0/9/130969754/pigativor_wokojoz_josususitututej.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_off00006e0b.bin
30f6653df4e9a14b5a4bd30abc2ef3067dd8a3c525f898ec91cbb294922d0111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0B 8576 bytes

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