Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d67c623952d828…

MALICIOUS

PDF

144.4 KB Created: 2020-12-27 19:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18e602d59ff1f73cd030d0010a699435 SHA-1: 1d1eed3ae87dcaeaa45dafe4eb9b0282baf03145 SHA-256: c5d67c623952d8284b5cf67856046b8fec267005594c3636c5f28910228de00c
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to generate traffic or distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://traffmen.ru/aws?utm_term=alendronate+mechanism+of+action+pdf
    • https://kemusawef.weebly.com/uploads/1/3/4/7/134770671/bcc6987a1.pdf
    • https://cdn.sqhk.co/zokasejiz/iiadjfU/pound_cake_cupcake_pan.pdf
    • https://cdn.sqhk.co/lemipetukaso/hiXigpz/instant_drag_racing.pdf
    • https://cdn.sqhk.co/kuzosexiwugu/ifhaTib/word_finder_app_for_words_with_friends.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gezizefefififa/japabakugekig.pdf
    • https://s3.amazonaws.com/rokuwapesu/google_password_generator_android.pdf
    • https://s3.amazonaws.com/jonora/epic_seven_rose_guide.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/valiant_force_guide_reddit.pdf
    • https://s3.amazonaws.com/fenatagazise/40400371533.pdf
    • https://uploads.strikinglycdn.com/files/d51df52e-7d32-40a9-8bd9-4edc3547724a/bapopagoxamisezajarakib.pdf
    • https://s3.amazonaws.com/geraromu/73861007369.pdf
    • https://uploads.strikinglycdn.com/files/9f5b1122-aa14-467e-b9b3-ac39993f41a1/sibumisedupojogoziwux.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e013.bin
06fef223548778f125d195ab06b836fcecfaae21a58981d298081936f7dfd741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E013 5384 bytes
font_01_sfnt_off0001f238.bin
c40238017a8d441a6b03d56577ac2b3d43c5a7acefcc215a39ee40009d4d03c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F238 13908 bytes
font_02_sfnt_off00021ec7.bin
1bced2c243a3fcc2bd80f27c49f1bcdb27216536c90f10d0bd2699d93d00365c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21EC7 16124 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.