Malicious PDF — malware analysis report

Static analysis result for SHA-256 5105ed7424547337…

MALICIOUS

PDF

77.9 KB Created: 2021-04-30 01:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ee7a834373894fd8eaafaa4709bef8a6 SHA-1: 2db2c6ccdea008e11716c3a6f6f8455784a05d71 SHA-256: 5105ed7424547337b82eee073e25373df0c662ae3ff5dac60be5b90f58f3fa6c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure for a free subscription. The presence of a PDF link farm heuristic and ClamAV detection indicates malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=free+washington+post+subscription+for+amazon+prime+members PDF link annotation
    • http://winoraama.site/baby_bumblebee_nursery_rhyme_lyricsol5qg.pdfIn PDF document text
    • http://indonesia2health.online/300068808549v3j9.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/best_guitar_strings_for_godin_a6_ultra5ldw6.pdfIn PDF document text
    • http://help-igcopyright.xyz/837906598536qit5.pdfIn PDF document text
    • http://sallehq.xyz/duracell_battery_charger_flashing_red6r8z7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_c77c7281d6a74916b5bd93bbff183d7a.pdf?index=trueIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_4bddf2d33c6e4086995c3030663a5c69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/20854789510.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/binkw32_dll_missing_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4eee63-495d-4479-9891-6af51192ebf9/kukemegujapaluwifudava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5c7373-b501-4f07-87a3-8567ffcab58d/jabotobunagatagosokuwube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc89b6f-a5e4-45f8-9a6d-ab64000f04b1/att_u_verse_tv_guide_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1e6490-3d0a-43c4-b38a-4c1514e8ecb6/behaviour_support_plan_template_victoria.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_e7971b5ceba840bc9a75c8994e65c37a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/what_is_the_air_fuel_ratio_for_diesel_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/puffin_browser_apk_cracked.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_59b0e5c020184163bbc860db0a7024d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fikuvine/delta_p20_scroll_saw_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/ringwraith_gauntlet_template.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_off0000f1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E9 5636 bytes
SHA-256: b781106f4880aaad2481599eda4cb864cb5eb8cb6f9c33895fece648edd2d1aa
font_01_sfnt_off00010509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 10868 bytes
SHA-256: 6725928857816e802c5d7d950e4394fd42b4e76028546f7ad44129dbf8d5c426

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