Malicious PDF — malware analysis report

Static analysis result for SHA-256 61622a6eb3e3b1d6…

MALICIOUS

PDF

34.2 KB Authoring application: QPDF
MD5: a86f403bd10b3e0560334c50f7e49f6e SHA-1: aec00462215149d37a02b23cde0a62660bda241c SHA-256: 61622a6eb3e3b1d693dc491bf7ab6fb53a4c40a9b4511dbeb8e56ea35a3eb7de
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which all point to other PDF files hosted on various domains. This suggests a link farm or redirection scheme designed to distribute further malicious content. The ClamAV detection and ML classifier also strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://teesarewild.com/uploads/1/3/0/2/130271087/dokavebuwibarif.pdf
    • http://edukasi.info/uploads/1/3/0/6/130639439/malatolo-jamizofex-jexemiwixiter.pdf
    • http://xoadd.me/uploads/1/3/0/2/130270893/jobukek_kotufopiv_jibaza_zidof.pdf
    • http://moorelaughing.com/uploads/1/3/0/6/130620484/degukab.pdf
    • http://nathantylerdavisfoundation.com/uploads/1/3/0/5/130588773/wamodijimesepafijiju.pdf
    • http://jujelalzle.site/uploads/1/3/0/4/130435811/6ab62.pdf
    • http://lookgreatnakedatanyage.com/uploads/1/3/0/7/130776518/3163305.pdf
    • http://ieibr.com/uploads/1/3/0/5/130552017/183185.pdf
    • http://yourluvyoga.com/uploads/1/3/0/6/130621196/586170.pdf
    • http://buckbucklestein.com/uploads/1/3/0/6/130603721/vubuduloda.pdf
    • http://mlp-losses.com/uploads/1/3/0/7/130738784/dukulor-leganojaka-gexumafedujimi-kegudegux.pdf
    • http://glendalemenssuit.com/uploads/1/3/0/2/130289271/fafudagano.pdf
    • http://sweetestdreams.org/uploads/1/3/0/3/130324234/130324234.html#software+to+convert+pdf+to+excel+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f0c.bin
7f0ffea798ace2570699542d769f3cc69bb64acfa186cdb7c397797aae91ac9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0C 7508 bytes

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