Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae310c85cf636838…

MALICIOUS

PDF

73.4 KB Created: 2021-03-11 03:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b5763513a250f10b421145b06b0f3c50 SHA-1: 40facb85713f4227093144d6f4965e5f2371e22b SHA-256: ae310c85cf6368382b00f07c89d141aa77873a68c08b5e77add51d9bc1b77fed
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link-farming campaign. The document body, though heavily obfuscated, contains references to "Snakes in suits pdf" and the authoring application "wkhtmltopdf", suggesting a lure. The PDF contains a large number of external links, including "https://ponafet.ru/wix?keyword=snakes+in+suits+pdf", indicating an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=snakes+in+suits+pdf PDF link annotation
    • http://katipef.medianewsonline.com/53173570513.pdfIn PDF document text
    • http://rusadezebep.mygamesonline.org/override_replace_toner_brother_mfc_7860dw.pdfIn PDF document text
    • http://itwomen.space/diy_fitted_face_mask_pattern_with_filter_pocket3i5fh.pdfIn PDF document text
    • https://niwejipudid.weebly.com/uploads/1/3/5/3/135383293/3810070.pdfIn PDF document text
    • https://dodapufil.weebly.com/uploads/1/3/0/8/130813701/be284.pdfIn PDF document text
    • https://rixedevo.weebly.com/uploads/1/3/5/3/135306589/linomaf-bofiridaba-xujupota.pdfIn PDF document text
    • https://xebuzoxovekig.weebly.com/uploads/1/3/4/0/134018553/2218137.pdfIn PDF document text
    • https://naxetiluwe.weebly.com/uploads/1/3/1/4/131483002/mediditepikid.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/14737664904.pdfIn PDF document text
    • http://eurofamily.pro/zapedenuk0t2sc.pdfIn PDF document text
    • https://bamupenasod.weebly.com/uploads/1/3/1/4/131410012/2a42ae.pdfIn PDF document text
    • http://salonlabs.xyz/37586752131v0dbf.pdfIn PDF document text
    • https://jezipupokegem.weebly.com/uploads/1/3/4/0/134042816/tofoxuworozo.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/zemunomipazikez/free_psd_templates_for_visiting_card.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/what_are_the_different_cost_flow_assumptions.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/scanner_app_free_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/gepodepopunaper.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/cute_boy_child_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/43389891369.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/76996064351.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/lokuvinesexinokebapobiba.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/the_family_man_full_movie_hd.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_off0000e439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 5076 bytes
SHA-256: a9538e20120f2b8e14917585f09e4fec93865cd1467d611051f6376d6b88ac32
font_01_sfnt_off0000f59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 10276 bytes
SHA-256: b8f224a38e7b77aa3cd93be17612ce0ecd98ced9c8a0d2095c192bb595fab054

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