Malicious PDF — malware analysis report

Static analysis result for SHA-256 530823aa5eb08adc…

MALICIOUS

PDF

33.3 KB Created: 2020-04-28 19:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5b3c314afb60320f061bc672312b0317 SHA-1: b9e2d527ca4d506237238191b4b1219cb35085c2 SHA-256: 530823aa5eb08adcda974a353e19d33a2397906660510a29fb221b514b1c0e81
62 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content through seemingly innocuous PDF documents. The document body text, though corrupted, contains phrases related to 'work experience certificate format free', suggesting a lure to entice users to click the embedded links.

Heuristics 3

  • 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
  • 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://robynvalerieprice.com/uploads/1/3/1/3/131398053/131398053.html#work+experience+certificate+format+free
    • http://ourplaceonrubens.com/uploads/1/3/0/5/130588188/fc880b14.pdf
    • http://redbantyboutique.com/uploads/1/3/1/3/131398356/d8aa4.pdf
    • http://charmedby406.com/uploads/1/3/1/3/131383648/dajage-nimilonubi-bizala.pdf
    • http://kanopy.store/uploads/1/3/0/8/130813998/5f5d2.pdf
    • http://ambitionoverfear.com/uploads/1/3/1/3/131383546/goxivukanenep_ralijovezaf_loseva.pdf
    • http://utahfilmcomposer.com/uploads/1/3/0/5/130551618/05ad14ca3d5f.pdf
    • http://andynelmeshomeimprovements.com/uploads/1/3/0/4/130477663/vexodami.pdf
    • http://alkautsartravel.com/uploads/1/3/1/3/131381134/1606061.pdf
    • http://ytgparty.com/uploads/1/3/0/7/130739140/rojajij.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_off00005aa9.bin
30046993085cd8567c505ff5abb9407d79ee5700c3dbf494754128d84d9651ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA9 7372 bytes

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