Malicious PDF — malware analysis report

Static analysis result for SHA-256 746f56550822c8f7…

MALICIOUS

PDF

78.6 KB Created: 2021-03-12 00:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 135b56959ee31c661d1131381c3f83ca SHA-1: 07155f1e6c8a8da99eb97ab85168190f2ae8956b SHA-256: 746f56550822c8f778aa443b8523f95de571a05871663ca3cf633a6f0f916591
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML heuristics confirm the malicious nature, classifying it as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://gimoguvi.ru/wix?keyword=4s+lipo+balance+connector PDF link annotation
    • http://dikagowoxi.sportsontheweb.net/mext_scholarship_research_proposal_sample.pdfIn PDF document text
    • http://novinove.iblogger.org/bon_de_livraison_modele_gratuit.pdfIn PDF document text
    • https://pagopolekabob.weebly.com/uploads/1/3/4/3/134305888/depegufaxogarizozi.pdfIn PDF document text
    • http://jobediniberine.scienceontheweb.net/maguwudod.pdfIn PDF document text
    • https://tuwunujanopir.weebly.com/uploads/1/3/4/6/134617400/608bbbaa682.pdfIn PDF document text
    • http://janusek.22web.org/best_advanced_excel_course_near_me.pdfIn PDF document text
    • http://danoguvu.medianewsonline.com/fashion_sewing_book.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/critical_hit_deck.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/digamutexijekagenewijidon.pdfIn PDF document text
    • https://tevipane.weebly.com/uploads/1/3/2/6/132681072/pukomagejo-xobotujupa-lupama-vimamuxuloxu.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/5a0a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_ef1039c8dda04a3fb48c5d01130caeb1.pdf?index=trueIn PDF document text
    • http://pobipegosaba.epizy.com/best_google_data_studio_templates.pdfIn PDF document text
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_295ec36d61744bdd92c98e872c9c9663.pdf?index=trueIn PDF document text
    • http://vokuloramemi.epizy.com/5067678214.pdfIn PDF document text
    • http://jilawovo.epizy.com/how_to_remove_lg_washing_machine_door_seal.pdfIn PDF document text
    • http://genovadeni.epizy.com/jivotajaleje.pdfIn PDF document text
    • http://fuluwaf.rf.gd/vodagetazugira.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_3e587a13e4d346b895f2c4af99d6e695.pdf?index=trueIn PDF document text
    • http://zudavowopo.epizy.com/elevator_union_aptitude_test_study_guide.pdfIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_d4aee4105fee466a9975e303e54292d8.pdf?index=trueIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_2f2f00aab6624d97af8f3e1c4ef509e5.pdf?index=trueIn PDF document text
    • https://ecf1b359-4982-44d9-836f-7e6f5fec4aa1.filesusr.com/ugd/da15c8_de1673a9dea845d7b580cb920ef934a5.pdf?index=trueIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_1f67a737f79f4c8d85aad3176e6f8c02.pdf?index=trueIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_3f2bbc76f9174d30b06bd335ec683e91.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_49bdb341903f479b873691da0afd6261.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 4848 bytes
SHA-256: 30e20c78afcf2d5f5577a07debef3e5737f4f4a4c7e5a56afcd9ec55e7d001ce
font_01_sfnt_off0000faec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 10472 bytes
SHA-256: e001ac7d69c5a220458fb29109abfc37629771d3d98b4b4748d0fd3daa4cc626
font_02_sfnt_off00011eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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