Malicious PDF — malware analysis report

Static analysis result for SHA-256 5817f3334b9c58e6…

MALICIOUS

PDF

69.7 KB Created: 2021-04-04 10:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5b4b9dae0a793ee43346e18fa59e0296 SHA-1: 98ab9995a58a01c0e9a487577dea4f1f4ba84ff1 SHA-256: 5817f3334b9c58e63b4c5de31c06921564175d40c433195bbd8d0fd9ba2f30cf
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://druttle.ru/wix?keyword=ipsd+204+registration PDF link annotation
    • https://wigufigavotafo.weebly.com/uploads/1/3/1/4/131452860/5535130.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/athdjeh/44630108897.pdfIn PDF document text
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/ebe646e9.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/g6haggk/launch_monitor_for_golf_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/bjbYjft/memes_stickers_para_whatsapp_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vanatuwo/hjh2jdH/5912871893.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/manajewomopok.pdfIn PDF document text
    • https://cdn.sqhk.co/besewixogiv/e7wihib/vodimisafokepiwovuje.pdfIn PDF document text
    • https://cdn.sqhk.co/duzimisese/gernl3p/can_you_get_live_local_channels_on_hulu.pdfIn PDF document text
    • https://cdn.sqhk.co/xizaxulubezu/chjFEUe/best_new_caption_status_for_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/zegetaru/hgijijc/amazon_prime_new_movie_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/bobofibu/icLigj8/ravigogisasojojanekes.pdfIn PDF document text
    • https://cdn.sqhk.co/zixapegof/fWkYjic/magazine_template_free_powerpoint.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/9vjaijr/ramedax.pdfIn PDF document text
    • https://pewovorawegoxuv.weebly.com/uploads/1/3/4/3/134351704/sumudadegajovewaf.pdfIn PDF document text
    • https://fijozemubo.weebly.com/uploads/1/3/4/2/134234573/ligujela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/bedonusupibo.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/zekekajidukipoxab.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/navient_deferment_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/imperative_formal_command.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/posakadazotuj.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26C 5392 bytes
SHA-256: 036b2180a98deed8a2ea2ff0498f4cc9c2fef634608bd0b196a78683113ffce6
font_01_sfnt_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 10876 bytes
SHA-256: 7a9316e15208e9ff9a7e2da2d382ba55a0ff85acb966ddfb633fd7a8ce1b1d83

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