Malicious PDF — malware analysis report

Static analysis result for SHA-256 892cc825327e8785…

MALICIOUS

PDF

29.6 KB Authoring application: PDF Studio
MD5: 4bb1201cecf64763e2396dc7943dfb49 SHA-1: 739adb6b0e6ddb5718159ced8d71562b13fab8d9 SHA-256: 892cc825327e8785373b27cf9f09086f7295d3ce585040ff2866045a34f26b49
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to external PDF files hosted on various domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://lenoraziegler.net/uploads/1/3/0/7/130739964/4435285.pdf
    • http://mineolatrading.com/uploads/1/3/0/2/130287866/dudomitewebel_bagujoperu.pdf
    • http://bathroom-renovations-perth.com.au/uploads/1/3/0/3/130379361/xixepudutisu.pdf
    • http://humblehandstulsa.com/uploads/1/3/0/6/130621362/b6623.pdf
    • http://gtyp.org/uploads/1/3/0/4/130435711/fejinivodavojozurom.pdf
    • http://rainfordvillage.co.uk/uploads/1/3/0/6/130604487/foserunubofuj.pdf
    • http://takeabowkilmarnock.com/uploads/1/3/0/7/130738748/busajuvo-suxifo-rimomiram-lirokurixolema.pdf
    • http://www.gingerology3.com/uploads/1/3/0/5/130542718/006c515.pdf
    • http://desktopbusinesscomputersnewyorkcity.com/uploads/1/3/0/6/130605222/wurag_fewejitiwija.pdf
    • http://nobookingfee.org/uploads/1/3/0/5/130546759/mibolu.pdf
    • http://fastpacemarketingllc.net/uploads/1/3/0/4/130490876/bobepozojejabuzoga.pdf
    • http://www.fettydfs.com/uploads/1/3/0/5/130589156/wudub.pdf
    • http://forums.jesusradicals.com/uploads/1/3/0/7/130740572/banopomiwapa_zelifi_gojowuvuge.pdf
    • http://2chicksandacookie.com/uploads/1/3/0/5/130588442/8798458.pdf
    • http://sta-66-99-58-203.ladse.org/uploads/1/3/0/6/130604030/130604030.html#ayyappan+remix+tamil+songs+free+download+mp3

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001abc.bin
3c513d05545f23e8a39bf1c82818e561d5713f65aef36c5bd4e6783f4a05f051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABC 7216 bytes

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