Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e6d6378a80bdf6…

MALICIOUS

PDF

73.0 KB Created: 2021-03-25 08:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 33d2df2a6224777c1887660e6c4f5663 SHA-1: cd29f1710ea49860290626e5704916773931204e SHA-256: 59e6d6378a80bdf6e332041fb361a31cd0c3ce0a59f4fef6a9322db8b46629c9
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+wear+a+toga+using+a+bed+sheet In PDF document text
    • http://quickpapp.online/what_is_national_news_definitionts95u.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/iiEggie/53060255802.pdfIn PDF document text
    • https://nexitikobimefa.weebly.com/uploads/1/3/0/7/130776699/sazogulove-xadetubiwege.pdfIn PDF document text
    • http://ebay-coupon.ru/cadence_and_cascade_sheet_music4qnvz.pdfIn PDF document text
    • http://maewallace.com/how_to_fix_wahl_trimmeredoxj.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/f5Sfj1N/fowimonama.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/heShabb/stumble_guys_multiplayer_royale_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473359/normal_60340242b13bc.pdfIn PDF document text
    • https://wojizenufojanog.weebly.com/uploads/1/3/4/7/134724603/abcafab5.pdfIn PDF document text
    • https://walamezer.weebly.com/uploads/1/3/0/7/130740591/rofok_kixof_wifotimite_daxekub.pdfIn PDF document text
    • http://remont-pc.website/pedagogy_of_the_oppressed_reviewdurqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452626/normal_603a6c290bc7b.pdfIn PDF document text
    • https://cdn.sqhk.co/mevutaxisut/eFTgcVy/15234712086.pdfIn PDF document text
    • https://fezewozigu.weebly.com/uploads/1/3/4/3/134318815/2090704.pdfIn PDF document text
    • http://akb54.ru/ravel_jeux_d_eau_sheet_music12mwj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/odometer_app_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/how_to_know_if_tablet_supports_otg.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/kindle_fire_hd7_4th_generation_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/android_app_maker_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/fomewolidu.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_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 5248 bytes
SHA-256: 0782c441fbc5eeeb2324448bb112de75746c492d2d4ae593f4fc34cf62415b20
font_01_sfnt_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 10216 bytes
SHA-256: 4fff2b1ccf168f51825a7dadfabb4a3e6a2589bf088afbfb1cde4986d48c1b82

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