Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c2a4289cfc63be…

MALICIOUS

PDF

97.8 KB Created: 2021-04-29 20:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7c03f017eda9d82088b1bf00fcc628d7 SHA-1: 26aca7b074f1e10d6c013a7690bba1cd5e1fdd14 SHA-256: a2c2a4289cfc63be299acb95b194a3086a8199c7b4e3b86d3a4c917ca5a3a0d0
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a large external link farm and ClamAV detection as a phishing trojan. The presence of numerous external URLs, with one specifically identified as a potential malicious redirect, strongly suggests an attempt to lure users to harmful sites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malicious redirection attack pattern.

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 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://baarspo.ru/strik?utm_term=the+magic+barrel+by+bernard+malamud+audiobook PDF link annotation
    • https://cdn.sqhk.co/xijogedobu/gchjjjj/neon_live_wallpaper_apk_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/jjfha0d/download_game_elite_trials_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipox/ggieKhg/infectious_disease_control_guidelines.pdfIn PDF document text
    • http://taxarigi.sportsontheweb.net/25747035416.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/converter_to_word_freeware_download.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/67160236739.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/jfugeUS/color_push_4d_bump.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/67372162539.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_1312105df2884bfdb416a5d7f313c8f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/kit_borussia_dortmund_dls_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850921f3-974f-4f73-9f5b-5d00c43f1376/woods_50007wd_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/dd_monster_maker_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65acb279-a8fa-45c9-a9dc-01db7c9894f7/how_to_adjust_tyrolia_sl_10_ski_bindings.pdfIn PDF document text
    • http://vidoniwofunevan.onlinewebshop.net/derivational_morphology.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/85529097545.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_7805714976e34793a97a24d0e44acbbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rufonali/5869860437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75bd0d4b-39dc-43a3-bd22-3dfbc8c59ead/godopinafulukugokopetevu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/best_private_android_browser_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/8027584421.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_023ec6eb06584157a146ec437c9ac0ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/382754b8-5ffc-4c61-97a5-e5a75e515ac7/how_to_calculate_interest_payment_on_loan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cacc664-1df1-4263-89b1-6cb0ffbb550c/flowers_of_algernon_quizlet.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_bcb72484ae5b4b95a746c00c54fe2ebb.pdf?index=trueIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_b6a5042d2e70422ea344f815f0464c67.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1A 5428 bytes
SHA-256: a3e7a8a96416d0e351fb2b28b9d35705532a074125888bb5a0dd73e019fa971d
font_01_sfnt_off00014e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6B 12832 bytes
SHA-256: f7c23e1db9b42f2c7d1fe3c63569b9d9a30383324831a92e0909e786b988297c