Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd980e34afdcb23…

MALICIOUS

PDF

74.3 KB Created: 2021-03-20 07:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 270ba64bd38bd1b0ea17aced53b48223 SHA-1: b21b5c8900c9bb0c26b2ad9df5857de1fe979d9a SHA-256: fcd980e34afdcb239004f563f2d1287aafd43735d43af91e5941c1478fac45d1
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is designed to direct users to malicious websites. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure points to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://resalured.ru/award?keyword=mikhail+bakunin+livros+pdf
    • http://shmelev.pro/why_does_my_clothes_washer_smell_like_sewerppbzf.pdf
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/lukolijovunumu-mabaxekoravop-kawizadovurubof-vogobojalodasix.pdf
    • https://cdn-cms.f-static.net/uploads/4454422/normal_601fa81559d11.pdf
    • https://sajixigepanosu.weebly.com/uploads/1/3/1/0/131070231/ff60b21f55b.pdf
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/8011967.pdf
    • https://cdn.sqhk.co/niripakexad/gj9hdFz/my_little_pony_ar_guide_review.pdf
    • https://static.s123-cdn-static.com/uploads/4474457/normal_5fffc5971fcaa.pdf
    • https://cdn.sqhk.co/mitajaso/ha5MLid/gdpr_data_protection_policy_template_charity.pdf
    • https://cdn.sqhk.co/towevefizub/sUjhojc/dejilixefoluwuz.pdf
    • https://static.s123-cdn-static.com/uploads/4366374/normal_5fc95dc82f0b4.pdf
    • https://cdn.sqhk.co/xolovagi/cwVfM2u/forest_green_bubble_jacket.pdf
    • https://cdn.sqhk.co/jarixizotib/4bjdgfH/fireball_anime_wallpaper.pdf
    • https://static.s123-cdn-static.com/uploads/4365606/normal_5feec47ecd852.pdf
    • http://connexion-amelii.xyz/sudalobxd8p.pdf
    • http://businesslinecenter.com/find_the_potential_difference_between_the_plates8y2ew.pdf
    • https://cdn-cms.f-static.net/uploads/4443598/normal_60295937f1f24.pdf
    • https://cdn.sqhk.co/liritefebat/idgc0mv/25815961401.pdf
    • https://cdn.sqhk.co/doxowite/whcfbji/free_calls_international_phone_calling_app_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wutebanik.epizy.com/tivafemofikaz.pdf
    • http://losapudobo.epizy.com/which_book_is_best_for_neet_physics.pdf
    • http://vakazavitin.rf.gd/how_to_file_a_claim_for_apple_phone.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e9.bin
8c9f0996390db5799dc5b720cc2c0cfac03e379f7ce937dee83954cfe79ad66d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 5396 bytes
font_01_sfnt_off0000f548.bin
09f022da2b4ccb9b099c433920b8e4d33edcc04f43b08a3e9527485e6081a9ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 12376 bytes

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