Malicious PDF — malware analysis report

Static analysis result for SHA-256 612d135a82d0d6fb…

MALICIOUS

PDF

29.5 KB Authoring application: QPDF
MD5: 5ab7f201c3189f676eb09cd3a327f649 SHA-1: 32694ed714d6ca13514f57a84721dfd9cee33f39 SHA-256: 612d135a82d0d6fb7176290d6eb16c525d4fe5546e98fc15693d3ee4dcb99da1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or to distribute further malicious content. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing or malware distribution intent. The document body, though heavily obfuscated, mentions 'Adverbs of degree exercises worksheets', suggesting a lure to trick users into downloading the linked files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nancymaldonado.com/uploads/1/3/0/5/130588678/wadod.pdf
    • http://nutritiongirl.org/uploads/1/3/0/6/130621401/713054235e0d.pdf
    • http://likuvoxa.sonxequyentri.com/uploads/2020/01/28/5dab2ac57d5d5d9.pdf
    • https://tudojunono.weebly.com/uploads/1/3/0/4/130491008/sozopiro.pdf
    • http://5pointauto.com/uploads/1/3/0/3/130323466/130323466.html#adverbs+of+degree+exercises+worksheets

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000103c.bin
fe4501ee6b44653f774b04fdbf2e6c1713e73a5642aabffb2ee16c0c5f70ab32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C 8192 bytes

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