Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b9a105c4b3e156…

MALICIOUS

PDF

30.4 KB Authoring application: QPDF
MD5: 6ab0fedbe57dffbb75bdd5c745ad5764 SHA-1: 5d266aaa94440f64452aa81b6568cb5b7d689249 SHA-256: 75b9a105c4b3e156dea1e9ea6b55073275f0d98b3c23e17049610e72c150a164
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of algorithmically generated URLs, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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://rollingdoorrepairny.com/uploads/1/3/0/6/130639958/matexaru_zumujok.pdf
    • http://stormdrinker.com/uploads/1/3/0/7/130738845/gebuxujurebe_rawovowag_ruzujova.pdf
    • http://brandipatterson.com/uploads/1/3/0/9/130969137/rotez.pdf
    • http://meroveo-officedistribution.store/uploads/1/3/0/4/130436121/1bed40c9.pdf
    • http://capitalmetal.com/uploads/1/3/0/5/130545985/530dc3ea88f.pdf
    • http://geographie-structurale.org/uploads/1/3/0/2/130270923/30d7099c5.pdf
    • http://unidacers.store/uploads/1/3/0/7/130739443/mikewozusek.pdf
    • http://crystalwittenutrition.com/uploads/1/3/0/4/130488983/debejegaxinarubezo.pdf
    • http://beaute-totale.com/uploads/1/3/0/2/130274338/kozatilukomeg_xakijugeg_lulun.pdf
    • http://solitlife.net/uploads/1/3/0/4/130477755/pupip.pdf
    • http://www.moldinspectiontestingandawareness.com/uploads/1/3/0/4/130478110/figital_nukukenuxitipi_somavobigoparop_wesamuwubevag.pdf
    • http://navinatural.com/uploads/1/3/0/6/130621363/720401.pdf
    • http://moonlightplanners.com/uploads/1/3/0/7/130776582/gaxuxereva-gesonuzod.pdf
    • http://web5.pleasingfood.com/uploads/1/3/0/7/130738972/130738972.html#lasix+to+treat+pleural+effusion

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001f8f.bin
a504e08596323ded5dacfc8af64e79e4818f03f12383d74ad809cfe5e290e461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8F 7164 bytes

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