Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35a7ebce38fcc0b…

MALICIOUS

PDF

58.6 KB Created: 2021-03-05 16:16:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57b54884d623b7feab2f8bf9fd88af3d SHA-1: a4ad366fdf6709e917239d9294cacee60fbb0473 SHA-256: c35a7ebce38fcc0bbc070218ef65cd4510be8d2d412362194e2e5ff16b07c9a0
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and an ML classifier, indicating it's a phishing lure. It contains an image-based lure designed to trick users into clicking a link, which redirects to a suspicious URL. The document also hosts a link farm on disposable hosting, suggesting an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6608

Heuristics 6

  • 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 58 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/aws?utm_term=2012+toyota+highlander+transmission+problems
    • https://dudasajaje.weebly.com/uploads/1/3/4/3/134362454/suwib.pdf
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/3724840.pdf
    • https://kadibunafi.weebly.com/uploads/1/3/0/9/130969561/3740e04.pdf
    • https://cdn.sqhk.co/kusamika/jbjajfq/doomsday_caught_on_camera_wiki.pdf
    • http://fakixigulidol.mywebcommunity.org/how_to_read_aviation_wind_chart.pdf
    • http://vivekawiga.sportsontheweb.net/what_is_the_theme_of_the_bell_jar.pdf
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/samiz-fasesewesevate-minikuja.pdf
    • https://sabumamopadav.weebly.com/uploads/1/3/5/9/135957329/162062.pdf
    • https://cdn.sqhk.co/janawezexoj/8qd2jh2/severe_thunderstorm_outbreak_meaning_in_urdu.pdf
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_11849551b1c340aeaa25fbd4762d6b06.pdf?index=true
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_d81cf4d46bc84733b7c61549896828ae.pdf?index=true
    • https://s3.amazonaws.com/sitozi/49613669661.pdf
    • https://s3.amazonaws.com/dovulavavo/rumigesipudovuwur.pdf
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_35c3d2b67121491fa3c3656682236c82.pdf?index=true
    • https://s3.amazonaws.com/mejobu/60288655333.pdf
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_5fede6cf659040adb22f489e73ee3108.pdf?index=true
    • https://s3.amazonaws.com/suxiweke/havana_violin_sheet_music_free.pdf
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_c167e16589144625bfabe0061b567b2a.pdf?index=true
    • https://s3.amazonaws.com/dosipive/madoka_grief_syndrome.pdf
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_d3152716ca8e49d0a26f813542d4f253.pdf?index=true
    • http://dasobiviwadodaj.atwebpages.com/how_to_train_for_5k_for_beginners.pdf
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_ee3d58d646d74993be9534b874415b24.pdf?index=true

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