Malicious PDF — malware analysis report

Static analysis result for SHA-256 70505c63468fca05…

MALICIOUS

PDF

86.7 KB Created: 2021-03-25 19:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 597c7480f727d766902fb642ef25d422 SHA-1: de9c48674676565749309e09adc823c1b425a01c SHA-256: 70505c63468fca05e6e5e880bbb0abbed41f3889d6e22a31efa2af947a3a39c8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9992

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 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://dafemum.ru/strik?utm_term=what+does+inkling+boy+say PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392210/normal_60062a665f67b.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/lutabodami.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/arteries_of_the_head_and_neck.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482671/normal_600f254a29db6.pdfIn PDF document text
    • http://vevebopawo.mywebcommunity.org/44287479422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_6033ed2e41e82.pdfIn PDF document text
    • http://itdiscounts.pro/jump_attack_genshin_impact43419.pdfIn PDF document text
    • http://fortuneocredit.com/dark_souls_3_cheat_engine_guideabmxh.pdfIn PDF document text
    • https://cdn.sqhk.co/xifusajexom/xjaieSM/bookmarklet_android_browser.pdfIn PDF document text
    • http://sweetygirl.club/nekokazigoxilizevesuw7cny.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/j1hcfup/how_to_get_lemonade_cat_in_tower_heroes.pdfIn PDF document text
    • http://pek-24.cc/nixirefozekekekokamefubuiij6.pdfIn PDF document text
    • http://goldstein.berlin/ripegpo775.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_14e21cd877cc43d7a61c4ff85e8e0fda.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pidufozu/51184104524.pdfIn PDF document text
    • http://zeteximezoxa.myartsonline.com/2006_vw_jetta_tdi_oil_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/free_wedding_invitation_card_template_editable.pdfIn PDF document text
    • https://48936d5e-4b15-4059-a328-ddb12afcc15e.filesusr.com/ugd/173145_a2ebb88ad09d40199e8aeacb09368786.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/android_game_engine_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/pdf_biochemistry_for_medical_students.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_8138f6c3784e4d75884c0eb00ef042c5.pdf?index=trueIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_f41b92981bb6411886d6ea26a7c940e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/hadees_sharif_bukhari_bangla_free.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_off000112a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A9 5308 bytes
SHA-256: 01a3898220991370f083e12e0998bc1abfe87cb3428556c5d73b964c8e372f8f
font_01_sfnt_off000124cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CC 11964 bytes
SHA-256: f45bd9a3e2d2d7f13954059028526d7a93ad29e879dd529fb2b6dc07f84c7a67

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