Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd62209486e60b68…

MALICIOUS

PDF

40.2 KB Authoring application: Smallpdf Desktop
MD5: c7586f75586bd91431503161bcc92e27 SHA-1: b6c213d934af27c7cf88605ade176b415229243f SHA-256: cd62209486e60b68e998c2daa6b938c7ae95145f95da4132ee60aa75bd2b8c9e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a tactic to manipulate search engine results or distribute a large volume of content, potentially malicious. The ClamAV detection and ML classifier further support its malicious nature, classifying it as phishing-related malware. No scripts were extracted from this sample.

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://keeganwenkman.com/uploads/1/3/0/7/130775590/kitupis.pdf
    • http://challengetosociety.org/uploads/1/3/0/5/130551245/4499197.pdf
    • http://www.partytokyovip.com/uploads/1/3/0/7/130739893/rojinusodafen.pdf
    • http://nbalovin.com/uploads/1/3/0/4/130489143/gisokaw.pdf
    • http://truegrit.org/uploads/1/3/0/6/130639827/jujadabafi.pdf
    • http://quickbongo.com/uploads/1/3/0/4/130483953/korununoguvinomasedo.pdf
    • http://beatricecloakefineart.com/uploads/1/3/0/4/130436182/97e810ff783984c.pdf
    • http://granvillewinery.com/uploads/1/3/0/2/130289227/9387563.pdf
    • http://msexcelplus.com/uploads/1/3/0/4/130476065/potedenevosuxi_jokusod.pdf
    • http://rampantgames.net/uploads/1/3/0/7/130775098/mefodojivo-degiwoxasidurib-nonevofidel-ponuradaleru.pdf
    • http://vatspeak.com/uploads/1/3/0/6/130639580/buvazinadok.pdf
    • http://becomeamedicareagent.com/uploads/1/3/0/5/130540700/vetikubazuje-bidiro-xebanijitojajag-mogatagamix.pdf
    • http://tp4seniors.ca/uploads/1/3/0/2/130272388/7119379.pdf
    • http://primrosehillflowers.com/uploads/1/3/0/4/130478347/duvepobed.pdf
    • http://lariateers.com/uploads/1/3/0/3/130313484/walexudipage.pdf
    • http://4picsell.com/uploads/1/3/0/6/130605040/roguda_gazode.pdf
    • http://mbanerds.net/uploads/1/3/0/4/130483872/daxirugu-vomogilifepu.pdf
    • http://narrowbandingcoordination.com/uploads/1/3/0/6/130605273/e1ff9.pdf
    • http://bestflooringco.com/uploads/1/3/0/5/130588613/2713986.pdf
    • http://nobordersadventure.voyagerwebsites.com/uploads/1/3/0/5/130540897/130540897.html#significado+anemia+normocitica+normocromica

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003f06.bin
a8c2908c3b4bd8f35f0380b62c1c136be0852cf7fa03005c90e24a08d32107f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F06 8336 bytes

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