Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c432fe828f7c834…

MALICIOUS

PDF

65.4 KB Created: 2021-03-26 08:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 777e3f1a82223f220d12648c7bc3c32e SHA-1: 95c1a1819e7937690bfcb8d0dc93c940e298f0d3 SHA-256: 9c432fe828f7c834d183a2dbb416c7a569e1debd6d97fcace988a7e1372373c3
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or distributing malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, and the ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs likely lead to further stages of infection or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9263

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/award?keyword=bucharest+street+map+pdf
    • https://kumobavogi.weebly.com/uploads/1/3/2/3/132303339/kukasupenugavilowu.pdf
    • https://cdn.sqhk.co/dejijadu/DjegeN2/philip_kubicki_bass_for_sale.pdf
    • http://vuvopogawuxaxax.22web.org/latest_hd_movies_free_tamil.pdf
    • https://cdn.sqhk.co/nitunoda/ffqzgdr/best_horror_movies_on_netflix_hulu_amazon.pdf
    • https://cdn-cms.f-static.net/uploads/4501777/normal_5fd0c12849005.pdf
    • https://static.s123-cdn-static.com/uploads/4475375/normal_5fec8e308d454.pdf
    • https://cdn.sqhk.co/mekibekowufe/ajeZvif/fanatical_football_apk_uptodown.pdf
    • https://liguputuked.weebly.com/uploads/1/3/4/5/134501996/gulerijarowijabemof.pdf
    • https://xinelonaveguv.weebly.com/uploads/1/3/4/6/134606197/ec4a74e476.pdf
    • https://cdn-cms.f-static.net/uploads/4426954/normal_6038d2bbeee5a.pdf
    • https://tebadigizowi.weebly.com/uploads/1/3/4/1/134109241/1716896.pdf
    • https://cdn-cms.f-static.net/uploads/4385004/normal_602b3a54c59b3.pdf
    • https://cdn.sqhk.co/sirepajaku/jdgdBQP/88256389058.pdf
    • https://ruwufinojib.weebly.com/uploads/1/3/4/6/134643146/4830364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ba8254cb-7e4a-43eb-b668-53ecaf2ec88e/words_to_describe_authors_writing_style.pdf
    • https://uploads.strikinglycdn.com/files/9e86b66a-51d7-488e-9daf-7ffadd55bc6e/cobra_detector_codes.pdf
    • http://xafotibelazes.rf.gd/729512149.pdf
    • https://uploads.strikinglycdn.com/files/9cf7e93c-22d6-4862-bba0-98f399645944/is_there_going_to_be_a_warrior_cats_movie_2020.pdf
    • https://uploads.strikinglycdn.com/files/e7659c8f-3900-4bb7-be16-6e564965796c/jetotozu.pdf
    • https://uploads.strikinglycdn.com/files/bc7aee24-3bf4-4f93-bd35-a91955bff540/32762496147.pdf
    • https://uploads.strikinglycdn.com/files/f8bbe035-1573-4ec0-b729-3beebd865567/best_way_to_learn_korean_for_free.pdf
    • https://uploads.strikinglycdn.com/files/61cbc817-e309-4e56-8db6-5a8718b5c0d3/mirezuroseb.pdf
    • https://uploads.strikinglycdn.com/files/7beb2890-9219-42b4-bd6e-ae023fa65955/simcity_4_free_download_softonic.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f19b.bin
c591438a739c8cbfa4a2d964ab34e6c19cf3b245e46f77aa9d7ea32231d34e74
pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 5412 bytes