Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37fe06c5064ff4f…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 05:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61dd969d948d091a254f1990862cd586 SHA-1: b1c1223d50996d2b2ccec4a37c3fbfb67cdab511 SHA-256: b37fe06c5064ff4f14f5f84354d244b76f67abab51f35fb48e42acaae42a5aff
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and advance-fee scam lures, indicating a phishing attempt. The document body, though heavily obfuscated, appears to be related to 'upgrades' which aligns with the lure. The presence of numerous external links, including one to 'pelibifir.ru', suggests the primary goal is to redirect the user to malicious content or a phishing site.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=best+upgrades+for+tippmann+98+custom
    • https://cdn.sqhk.co/fawabanof/jbjbou2/hand_drill_guide_kit.pdf
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5ff8c7439a869.pdf
    • http://lexamopelezun.mywebcommunity.org/cardiac_conduction_system_pathway.pdf
    • https://cdn.sqhk.co/ripigopes/PyjdL15/download_game_bomb_squad_mod_android_1.pdf
    • http://roxelejabojafe.scienceontheweb.net/architecting_microsoft_azure_solutions_study_lab_guide.pdf
    • https://static.s123-cdn-static.com/uploads/4530846/normal_5ff25c5d92a11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nakeviw.myartsonline.com/woruzotomebode.pdf
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_9f1b07f7748c47adbaee4e0479e26afe.pdf?index=true
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_bcca525d000e4d728423993f40a92060.pdf?index=true
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_5df0742c5472424aa97f496c5bb38931.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bc2dc0a6-587f-450d-8b21-16d2372fcaef/shark_lightweight_iron_reviews.pdf
    • https://uploads.strikinglycdn.com/files/10ce2584-ffc3-4509-8fb6-7f05c761b381/dell_e6410_driver_download_windows_7.pdf
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_03053806a16b4a23844d1297c0e2d46e.pdf?index=true
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_0bfc56e223a34bf6856b7487e6d88882.pdf?index=true
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_198eb4c4316b4fd49639fa5049f9dca7.pdf?index=true
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_99b911bbd9634f7a916a2a225c33d1a2.pdf?index=true
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_413477d757584830be539bdbf7ad0f2d.pdf?index=true
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_670bfa99ef0740e2abf1dc67bb58ae27.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fcab0cc0-a94d-476d-b953-95114827d3fc/which_is_the_best_smartwatch_brand_in_india.pdf
    • https://uploads.strikinglycdn.com/files/8f4b6b6c-48f0-4022-84a0-8204427ab7ea/95874642384.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_off0000ed97.bin
020c8f65baeb0f6d2d3434e4df4906ea84bcca5042ea48f492ec243ea8c165f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED97 5840 bytes
font_01_sfnt_off00010167.bin
7df3b4226826bd7b08777e4c18eefb6471cbc2250d37e5dd629659ee6623c27c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 11540 bytes

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