Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ff9e71e1a8f623…

MALICIOUS

PDF

42.7 KB Authoring application: QPDF
MD5: 1b19ca10de0813538aa65138510a2140 SHA-1: 7c574c7c33a5d358c1ec26d0a9741e017475fdd7 SHA-256: 89ff9e71e1a8f62362175fdce76653e2e52b3bd2af8e62ab33033439a9c3a437
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded links to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the heuristic firings and numerous external links suggest a phishing or content distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://careerdiscoverycamp.com/uploads/1/3/0/5/130551198/furuputu.pdf
    • http://gaycbrinson.com/uploads/1/3/0/6/130604126/wafemativaxosos-mawopafaka-kumajeleginevo.pdf
    • http://yosuftaqawi.net/uploads/1/3/0/7/130775830/6edc80d41a.pdf
    • http://tonysaladinobaseballtournament.com/uploads/1/3/0/5/130543320/2231711.pdf
    • http://hostmaster.thewoolloft.co.uk/uploads/1/3/0/7/130740262/6f679ff389d.pdf
    • http://keleticajewelrydesign.com/uploads/1/3/0/2/130288006/lomowutabomuwuvumuda.pdf
    • http://sellsla.net/uploads/1/3/0/4/130477490/lazowez.pdf
    • http://cosmicbabies.org/uploads/1/3/0/4/130488542/gumupuroleko.pdf
    • http://sportrock.org/uploads/1/3/0/5/130588679/vusekaxarasexifirof.pdf
    • http://macym.org/uploads/1/3/0/7/130739107/safazur.pdf
    • http://www.cabads.net/uploads/1/3/0/7/130739578/kudexira.pdf
    • http://www.bathmasterdesigns.net/uploads/1/3/0/6/130605186/d85131f0bf.pdf
    • http://bluewaternrhs.org/uploads/1/3/0/2/130289655/fomosare.pdf
    • http://thecvap.org/uploads/1/3/0/2/130273752/519570.pdf
    • http://omahaventuregroup.org/uploads/1/3/0/4/130476143/1888146.pdf
    • http://nabcepexamstudyguide.com/uploads/1/3/0/5/130588865/4076004.pdf
    • http://nevadarapidcash.com/uploads/1/3/0/5/130545636/zadudekuxosodexibit.pdf
    • http://getjackedtrucking.com/uploads/1/3/0/4/130483492/bumiralesugalug.pdf
    • http://x0172818xstreamtravel.xsideas.com/uploads/1/3/0/6/130620438/130620438.html#hernia+de+disco+lombar+fisioterapia

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004543.bin
75a2ea4272c00fef43010646cec8d39a87c8c2f63f37fb429f77d485e8b9e18f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4543 11072 bytes

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