Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f881f3eeef6ee30…

MALICIOUS

PDF

72.3 KB Created: 2020-11-14 07:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 33d34fc7edcfb0f684f637ec366174ec SHA-1: 211b56aa290566d9fa4324ac7f75c344400e9d72 SHA-256: 4f881f3eeef6ee307742a47d7a540aa9baad1a45febe9f28fb6b4ce3b759ef7d
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=who+viewed+my+whatsapp+profile+free In PDF document text
    • https://kirewigofe.weebly.com/uploads/1/3/4/3/134382955/c37b1547d7919d.pdfIn PDF document text
    • https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/telebe_desijipuf_pepijipazuno.pdfIn PDF document text
    • https://jotevalosovem.weebly.com/uploads/1/3/4/3/134385082/87ed2c51a.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/8008187.pdfIn PDF document text
    • https://tepunejor.weebly.com/uploads/1/3/4/6/134636279/e443f14ab3dd005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471230/normal_5fa7c7411a776.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://s3.amazonaws.com/fadedosi/directions_sioux_city_iowa_to_waterloo_iowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b951e9f-0ceb-4894-a5f5-7a573f641ba4/partitura_del_canto_ya_no_eres_pan_y_vino.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/zitexoma.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/xalowoxokanudibuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af4cc41-0db8-4f54-9fef-3deb465a464e/activate_roku_for_showtime_anytime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6c3417-fb61-47d6-b761-84fbb2000f0e/cursed_treasure_3_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155143ac-747f-4ba9-8823-fb8d9a65932f/53153847669.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9C 5228 bytes
SHA-256: e8ed5461d89a017df18260eb2928234e3f54ad95d1c095268558ad3e9414b1bf
font_01_sfnt_off0000e083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE083 11144 bytes
SHA-256: ca5a665b327bf2f8151d0084514836ad88925c655cc48b51dd6b40f387397f90
font_02_sfnt_off0001066d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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