Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb2a2512320838b…

MALICIOUS

PDF

64.0 KB Created: 2021-04-23 09:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb40e513f1f3ba2ef40bbe402ba720b4 SHA-1: d9c3cde3831abb3d721adb80f8b3318bd2118a44 SHA-256: 6fb2a2512320838b0309750072e6b0ffa145b9fc66658b542119d156c4318871
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, forming a link farm, and directs users to a suspicious URL that appears to be part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8501

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://mezovuduw.ru/strik?utm_term=google+maps+search+history+android
    • https://cdn-cms.f-static.net/uploads/4366358/normal_600dacaf0a14e.pdf
    • https://static.s123-cdn-static.com/uploads/4380219/normal_5ffb097496cf1.pdf
    • https://lugifepitel.weebly.com/uploads/1/3/2/7/132710690/mumov_bikirizev_pebuloliwaparev.pdf
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5ff272644d5ed.pdf
    • http://monoga.space/analyse_af_reportage_artikelhsusz.pdf
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/wotoje_denisobini_verez_tadek.pdf
    • https://cdn-cms.f-static.net/uploads/4467043/normal_5fd9c9293104e.pdf
    • http://microbladingcertificationdfw.org/tough_mudder_training_programmesht4b.pdf
    • https://zukevijidogokil.weebly.com/uploads/1/3/0/7/130738647/jilirif.pdf
    • https://jotowaviroretog.weebly.com/uploads/1/3/4/6/134604658/a004a.pdf
    • http://hangzhoumetal.ru/disbelief_papyrus_fightabtd0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jadudusujuje/samsung_software_update_800_resource_error.pdf
    • https://uploads.strikinglycdn.com/files/468ebe24-9b00-4790-88f1-c41d02647b8b/63489478506.pdf
    • https://uploads.strikinglycdn.com/files/a826661b-9bda-42c5-9732-3edda2f8c7a5/is_the_intruder_on_netflix_or_hulu.pdf
    • https://s3.amazonaws.com/gofiguj/komudupolomevitod.pdf
    • https://s3.amazonaws.com/jiwisigetizoxif/django_template_if_else_elif.pdf
    • https://uploads.strikinglycdn.com/files/a57a0241-f43f-4a2c-a27b-1d91753bc419/how_do_you_start_a_narrative_paragraph_example.pdf
    • https://uploads.strikinglycdn.com/files/95600a80-6099-44dd-a37e-69915222b123/90119663128.pdf
    • https://uploads.strikinglycdn.com/files/8cb6974c-de8b-4d72-958a-a46082e22a76/74571972430.pdf
    • https://uploads.strikinglycdn.com/files/33036da6-682b-4d7d-931b-b4a9cb72dec3/bach_cello_suite_1_prelude_sheet_music_violin.pdf
    • https://s3.amazonaws.com/kozewuposoridil/suddenly_seventeen_free.pdf
    • https://uploads.strikinglycdn.com/files/30457ec9-491e-4f0f-ac8d-36cd5be33f34/nikon_coolpix_p520_operating_manual.pdf
    • https://uploads.strikinglycdn.com/files/c97c4a2e-8bf8-44b9-bbfd-8079b79e187c/10126609423.pdf
    • https://s3.amazonaws.com/xeroguru/26201827732.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecfc.bin
fb1803c8e8763ec765a8f3fb10e62e32b10256f7ef8facc8e51f480bc7380640
pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 5620 bytes