Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe81d87f4da4527…

MALICIOUS

PDF

29.3 KB Authoring application: pstoedit
MD5: 5c4d6538641f883e7a5cda6f40cfc18c SHA-1: 45be076cbb69b5618c323a01d82d0b2d770bf8ec SHA-256: 5fe81d87f4da45270a082eb55204bbd5c104e155a96125b9f78873e3e44135c1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, identified as a link farm, which is a common tactic for distributing malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically related to phishing and traffic redirection. The document body, despite being partially corrupted, mentions 'Harcourt grammar grade 5 answer key' and includes URLs that likely lead to further malicious PDFs, suggesting a lure to download malware.

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://cdizzlerocks.com/uploads/1/3/0/4/130483879/b2c9c97.pdf
    • http://clareellis.com/uploads/1/3/0/8/130813837/4052552.pdf
    • http://pacxo.us/uploads/1/3/0/7/130775974/094a376c487f.pdf
    • http://albertarescue.com/uploads/1/3/0/7/130739928/91fcf2745.pdf
    • http://www.krystleskanines.com/uploads/1/3/0/9/130969164/titawulabavuliz_kozule_wurakosolane_lurilodaraj.pdf
    • http://eeshv.eesforjobs.com/uploads/1/3/0/2/130287835/8080601.pdf
    • http://www.imarketsjumpstart.com/uploads/1/3/0/6/130621603/fikefila.pdf
    • http://onsub.space/uploads/1/3/0/7/130739986/wasuxod_tamapotes.pdf
    • http://www.broadcairnassociates.com/uploads/1/3/0/6/130604109/zajawub-rizifidis-baduvavifo-fozakiba.pdf
    • http://sallysfitnessfortress.com/uploads/1/3/0/3/130379625/topozemenamo.pdf
    • http://project58serve.org/uploads/1/3/0/2/130273623/17a395.pdf
    • http://www.usmgsol.com/uploads/1/3/0/7/130739875/ddcf5a1c92f0.pdf
    • http://kimresine.ca/uploads/1/3/0/2/130289557/130289557.html#harcourt+grammar+grade+5+answer+key

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001a0a.bin
5ea058cc3708ebb403939125169f3adcc0c6362af3ce5632a2a4495107614ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0A 7932 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.