Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedfccac1e1c0daa…

MALICIOUS

PDF

38.8 KB Created: 2020-05-21 03:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2aa03b251a2a97178e1517ee1ca6c8e SHA-1: d1fb797bcb6f1a7a6186cb68ca74d5cd614f44b5 SHA-256: aedfccac1e1c0daa4b22e6371b7817ba2611bc7cb6f7ad70753b7eb8fcab4bdc
94 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links, many of which point to other PDF files hosted on different domains, suggesting a link farm or redirection scheme. The document body contains a mix of seemingly random text and URLs, including the primary URL http://qualitycareafh.com/uploads/1/3/0/4/130476013/130476013.html#i+am+jackie+robinson+book, which is likely part of the lure. The presence of numerous similar PDF links indicates a coordinated effort to distribute malicious content or redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://qualitycareafh.com/uploads/1/3/0/4/130476013/130476013.html#i+am+jackie+robinson+book
    • http://edendesignsolutions.net/uploads/1/3/0/6/130620728/zanigesunuti.pdf
    • http://queenslegacyfoundation.org/uploads/1/3/1/3/131380212/vetapexizi_roruw_lavanuxuwidolom_wabok.pdf
    • http://jjmockcleaning.com/uploads/1/3/1/3/131378993/3482991.pdf
    • http://ego-egypt.com/uploads/1/3/0/6/130621022/tojoguresa_zugufexufikav_furalolafib.pdf
    • http://fmsanalysis.com/uploads/1/3/0/4/130435839/bulax-vatonaru.pdf
    • http://roycepollard.com/uploads/1/3/0/5/130550921/1405d90f.pdf
    • http://philhandy.com/uploads/1/3/0/5/130539108/355417.pdf
    • http://tennantcreekhighschool.com/uploads/1/3/1/8/131871891/bepesusur-fipuku-wekukivob.pdf
    • http://helpfordrivers.net/uploads/1/3/0/7/130739343/wetaxitogoko_gazaxuna_dejazotubi.pdf
    • http://wellfitunionsport.com/uploads/1/3/0/6/130639350/7248655.pdf
    • http://miraclecreations.shop/uploads/1/3/0/6/130604148/negegumuke_zidefunozijel_tupominu.pdf
    • http://southadamssquare.com/uploads/1/3/1/1/131163752/e07fa.pdf
    • http://felixalderete-gep.net/uploads/1/3/0/6/130621521/wonax-jagobalowigona-sigotikeramerav-robomupeluwote.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_off00006d4d.bin
1ac78b8492f44be4e6402e3cc0a8cd378367ee66e19c1cf4ede84fa2fa66fc0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4D 10260 bytes

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