Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd246e5eb02db83…

MALICIOUS

PDF

96.4 KB Created: 2021-03-15 13:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a94ed318511b6903a428308f48fe618f SHA-1: 559092acdab3246b5726005ae9e5874101711f05 SHA-256: afd246e5eb02db83bf41e8f4fe177102e8e746abfdba56faeafe80cf4b2444cf
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO manipulation tactic. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to deceive users with promises of prizes or funds, a common phishing lure. The presence of multiple external URLs, including a link farm, and the specific lure type strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://zajinet.ru/award?keyword=laboratory+experiments+in+microbiology+11th+edition+pdf+download
    • http://bewudewumit.sportsontheweb.net/99798990071.pdf
    • https://lewumime.weebly.com/uploads/1/3/5/2/135297270/2021498.pdf
    • https://menaminalopu.weebly.com/uploads/1/3/5/3/135318725/vulej_dufujoz.pdf
    • http://ketaton.mywebcommunity.org/6096525370.pdf
    • https://fuzakeraza.weebly.com/uploads/1/3/4/8/134848422/zewasajid.pdf
    • https://gapeduruje.weebly.com/uploads/1/3/2/6/132681343/xezazikaliwabawu.pdf
    • https://ludolukek.weebly.com/uploads/1/3/4/6/134699908/829950.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b981f9c5-e5c7-45e7-bd09-55135a9ec47b/64263871033.pdf
    • https://uploads.strikinglycdn.com/files/5b724f0b-5a4d-47d3-8864-bdcc18d2d2c8/34605172609.pdf
    • https://s3.amazonaws.com/luxelula/spanish_grammar_book_free.pdf
    • https://s3.amazonaws.com/dutimajizowa/77305763571.pdf
    • https://uploads.strikinglycdn.com/files/92ca4a5f-01ee-4826-bdc3-b56cec126fa4/rowekarabilejubepokuramix.pdf
    • https://uploads.strikinglycdn.com/files/f0a7952d-075d-449d-9d11-c4cd70ba2517/making_money_on_instagram_live.pdf
    • https://s3.amazonaws.com/miwolezedubujoz/truecaller_cracked_apk_free.pdf
    • https://s3.amazonaws.com/jifesu/zepowotuwuxupaga.pdf
    • https://s3.amazonaws.com/wuxupewu/15014149764.pdf
    • https://uploads.strikinglycdn.com/files/25d1b127-ead3-4c76-97e9-8b86e16b3fd5/how_to_make_a_homemade_face_mask_recipe.pdf
    • https://uploads.strikinglycdn.com/files/23185410-796d-498a-906c-779a7efe1f1b/do_you_have_to_drain_a_delonghi_portable_air_conditioner.pdf
    • https://s3.amazonaws.com/ravuxudibure/colorado_secretary_of_state_form_llc.pdf
    • https://s3.amazonaws.com/xezonijida/waze_android_auto_apk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133eb.bin
04d99d7897d94a136e9ebaf65b788bfad9941c16b13e282f3824b4634b4ffeef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133EB 5964 bytes
font_01_sfnt_off0001482a.bin
f01985b8431abd7c3ca4eb5cd21b23ccf1b56981cd9aeefab32e4ab53aec734a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1482A 12876 bytes

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