Malicious PDF — malware analysis report

Static analysis result for SHA-256 1743a685751fc32b…

MALICIOUS

PDF

58.2 KB Created: 2020-12-16 20:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f748fd628b9e9e2e8eda9f52cd4d9a1 SHA-1: f24db3582f4044d048b02b52d0bfe4c4f6785237 SHA-256: 1743a685751fc32bf7b5dac5646c558c5f0adcf6233821d1747040ca9a494477
154 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 PDF files on various hosting services, indicating a link farm or SEO manipulation tactic. One of the primary external links, 'https://traffking.ru/strik?utm_term=the+fable+of+the+bees+sparknotes', is suspicious and likely leads to malicious content or phishing. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8225

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.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/strik?utm_term=the+fable+of+the+bees+sparknotes
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/3791768.pdf
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/kupuvi.pdf
    • https://kusuvafivubiret.weebly.com/uploads/1/3/4/8/134888197/foxij.pdf
    • https://nujolekilerimiv.weebly.com/uploads/1/3/4/5/134501562/5553199.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc4ed69e2fce462bca5ae1b/t/5fccbd0cf94b6402b2175c73/1607253260565/wisafokolojujubesonoseser.pdf
    • https://static1.squarespace.com/static/5fc562fe40f1034a5cc6d69f/t/5fc9c032fedaa13a4861dd9b/1607057458409/house_paint_by_number_crayon_color_glitter_books.pdf
    • https://static1.squarespace.com/static/5fcf6518246a5d73f47758ac/t/5fd1790e23f2866aa37f624b/1607563542098/cosmology_vs_religion.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf521208845d09248120d5/1606373915126/prem_ratan_dhan_payo_movie_download_in_telugu.pdf
    • https://static1.squarespace.com/static/5fc0f7235687f52b6b817f64/t/5fcd1a2be43f2b00a8aeccbd/1607277100508/tafatezaxurewu.pdf
    • https://static1.squarespace.com/static/5fc0e44e92c50b1a1e7784dc/t/5fc1000a3c02f22b9d30d86f/1606483980459/tetimajaw.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf96ec7afe470b556298c/1606220146094/bc_rich_warbeast_extreme.pdf
    • https://static1.squarespace.com/static/5fc042db8787e8798968ae67/t/5fc0e9143f75b16643f5271d/1606478100934/pathfinder_best_level_1_sorcerer_spells.pdf
    • https://static1.squarespace.com/static/5fc5a227c6d96458364249a2/t/5fcaeb5933fb14715cb15142/1607134041977/30_in_1_game_collection_vol_1.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d35d.bin
22b937ca40b9e747b119be9ea6f0e3135e932ca4d052ed4b014e8ea695411269		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD35D 5140 bytes

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