Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e544ba5ffd5253…

MALICIOUS

PDF

39.9 KB Authoring application: Smallpdf Desktop
MD5: 1943144564abc5ed023d2b51568fab1f SHA-1: 22c20565d5099aa4a6ade215cadce5c356ed7cb5 SHA-256: 33e544ba5ffd52531fc8242a87b5a11b142c90f10d53b298a308c66058c6aca3
172 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://souldelicious.org/uploads/1/3/0/6/130621789/wikalepe-sevunilo-fevobavid-nadozug.pdf
    • https://norijenalat.weebly.com/uploads/1/3/0/3/130313603/tufafitabu.pdf
    • http://sakp.tech/uploads/2020/01/28/bopew_nezigibo_sakifopusujono_bosuzuwik.pdf
    • http://puppylovepetcarema.com/uploads/1/3/0/4/130436172/4212829.pdf
    • https://bivutijeluramu.weebly.com/uploads/1/3/0/2/130288479/b36ebbe41bcd.pdf
    • http://rogasomuri.daikabin.com/uploads/2020/01/27/b7f840.pdf
    • http://thehappygirlstore.com/uploads/1/3/0/5/130590545/130590545.html#easy+voice+recorder+apkpure
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001178.bin
8cfeefb24229addaa9cf62052ab1d2caeb96b7897d5a698716cda53d64dbac03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1178 9188 bytes
font_01_sfnt_off00005344.bin
fbf89edd09f026aa8951df5843c3147ed54b3ce78350ad9ad4d2040ee0f036a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5344 16564 bytes

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