Malicious PDF — malware analysis report

Static analysis result for SHA-256 57771a416b46d6bf…

MALICIOUS

PDF

68.1 KB Created: 2021-03-18 12:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 394067b67fd8d2d130e0dd7b42f62736 SHA-1: a8d42ad16decf71c16d90e0fa8515559f1aea341 SHA-256: 57771a416b46d6bf553b8272c3ce4b9cedc64b09a41751b5c8d7514e69a9690f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing or malware distribution, containing numerous external links. One prominent link is to 'druttle.ru', suggesting a potential phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5247

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://druttle.ru/award?keyword=calendar+ortodox+2020+pdf+download
    • https://cdn.sqhk.co/fapiwejagiz/hdmuif8/boxhead_zombie_wars_unblocked_at_school.pdf
    • https://lalibirubifo.weebly.com/uploads/1/3/0/8/130873838/d51a70850.pdf
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/lodigomefafira_vixibiko_zipar_muwajuga.pdf
    • https://degewobajobazim.weebly.com/uploads/1/3/5/3/135324790/kazawikaw.pdf
    • https://cdn.sqhk.co/modajili/P0WZEic/tovugezira.pdf
    • https://cdn.sqhk.co/damapegapi/gdKhftu/cytosine_always_pairs_with.pdf
    • https://tezilejesitox.weebly.com/uploads/1/3/1/1/131163634/031b0.pdf
    • https://uploads.strikinglycdn.com/files/f20522fe-cea9-4675-851c-330685ed85c2/computer_systems_analyst_class.pdf
    • https://b1d4f555-1eac-4d61-aa83-27206cf3ee4b.filesusr.com/ugd/1706f5_1d374190d579490f8d1fde895a179950.pdf?index=true
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_1fc165d1349e47699068b7a7641893ac.pdf?index=true
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_5880331f60674ad69d49f1cb38627551.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6cae1c59-a59b-4c6f-938e-d323706c26bd/how_to_reset_check_engine_light_on_chevy_malibu.pdf
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_8d25ebcfe6f240988bf9513b0221fd9a.pdf?index=true
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_5beda73241574b6a865cba18c66de979.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f952c145-38db-4904-b09c-e9935d77feaa/91452041766.pdf
    • https://s3.amazonaws.com/fapaga/cancriformis_grn_spanien.pdf
    • https://uploads.strikinglycdn.com/files/a34b40f2-ae4e-4610-a66f-c4eb8f4f7bb1/34642635751.pdf
    • https://s3.amazonaws.com/welanisowari/higher_ground_stevie_wonder_sheet_music_free.pdf
    • https://uploads.strikinglycdn.com/files/3ff3b52d-671e-4fea-98a2-5b10837b7288/4403232994.pdf
    • https://s3.amazonaws.com/xufaxoferugod/rojomapewejitad.pdf
    • https://uploads.strikinglycdn.com/files/e088fc1d-abe7-4e40-bbae-1be35d7c6e40/71559523767.pdf
    • https://uploads.strikinglycdn.com/files/e4ad1d8d-469f-481e-8a2b-fb1a85e2677f/bodyweight_workouts_for_legs.pdf
    • https://uploads.strikinglycdn.com/files/8d142066-a43e-4ab6-b0c0-47dec0cc7147/55851857341.pdf