Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15d57035186511e…

MALICIOUS

PDF

30.9 KB Created: 2020-04-05 12:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: db25a1e1cfaaefe3ccf40cf380fcfa07 SHA-1: 750f74b6c3f180bbcdc72ede89635ba72e0afb18 SHA-256: a15d57035186511ef91591a7d3049db1940ac3f472813aa7e6b07f4e6db77267
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The embedded links are likely intended to lure users to malicious websites or download further malware.

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://thehappygirlstore.com/uploads/1/3/0/6/130604232/130604232.html#xerox+workcentre+7830+service+manual+pdf
    • http://escsectec39.com/uploads/1/3/0/2/130274349/7694280.pdf
    • http://finepointwedding.com/uploads/1/3/0/4/130483275/sutozad.pdf
    • http://rai-robertsonathleticinstruction.com/uploads/1/3/0/5/130539218/9386149.pdf
    • http://mswilliamsonline.com/uploads/1/3/0/7/130739678/6462809.pdf
    • http://shopnikkibella.com/uploads/1/3/0/6/130604520/watozerukomal-febewusujajafa.pdf
    • http://peoplesrepublicny.com/uploads/1/3/0/4/130477126/2070923.pdf
    • http://ctrlaltcreate.solutions/uploads/1/3/1/4/131437656/28e6534232ce777.pdf
    • http://businessattorneyguide.com/uploads/1/3/0/5/130539091/tigozifefejuwik-renek-xusudid-limugumebe.pdf
    • http://poweryourcore.com/uploads/1/3/0/5/130551581/perizavotamolop.pdf
    • http://keithlundmark.com/uploads/1/3/0/7/130776298/sanelizin-kuwelubavumuv-kopofifi-xiniwuxum.pdf
    • http://aldersonghealing.com/uploads/1/3/0/5/130545254/4b11b4400f1ea.pdf
    • http://medcottageca.net/uploads/1/3/0/3/130323461/sebamukoxononot.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_off00005263.bin
e523b966ee7084726f59dd32a556a4a3353239a7180c1b21d0a6acece0f3adb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5263 7156 bytes

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