Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ff914915c2eb6e…

MALICIOUS

PDF

94.2 KB Created: 2021-06-05 09:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5198474783ec5b6dd6843f3455e8bebb SHA-1: 95460501169aae28c0ea54887c80de3da68f2772 SHA-256: 67ff914915c2eb6eedbfff9d23fc8299ab1d6af111eaf5710ead726fdb687bef
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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
  • 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://drafthe.ru/pbw?utm_term=istikhara+dua+transliteration+in+bangla PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383156/normal_606397164e951.pdfIn PDF document text
    • https://mugepofenabozu.weebly.com/uploads/1/3/5/9/135970449/bidit.pdfIn PDF document text
    • https://detidigem.weebly.com/uploads/1/3/4/4/134491675/8650536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_6046e040058c5.pdfIn PDF document text
    • https://tijezelaxupoki.weebly.com/uploads/1/3/5/3/135340387/10d8da7ae6a9.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/wapigakopezer.pdfIn PDF document text
    • https://sagokawosulo.weebly.com/uploads/1/3/4/9/134904643/pigogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_60522baf56448.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/122e9e25-05b4-435e-b595-23f18b45caf9/38141815647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5607b65-1c35-4020-ab1c-0d88b658472b/how_to_put_whirlpool_dishwasher_in_diagnostic_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d18778-f18d-446c-b60e-ef22576f0c3f/6903919515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbe5927-dbb1-40bf-89f3-38310ee3c337/64788471843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c20f5e8-cab7-4243-96ac-7e349951b486/john_the_ripper_brute_force_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85de463d-9857-4729-8a21-2a4589074526/maya_angelou_1995_book_of_poems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c025164e-1023-466b-95d8-faf17417a58d/madiwabidugodumaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6667a7-70ea-4bf7-8db6-6280b903be87/what_methods_did_the_suffragettes_use_to_get_the_vote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16904cef-4a3c-40fa-8971-e02f6decb8d8/our_lady_of_the_lake_university_mens_basketball_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41eeeaa-f7df-420c-8d2d-343df1c6c05c/63642443805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a34259a-48a9-4310-911d-f89e7d67282a/mefosiruxu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013c59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13C59 26552 bytes
SHA-256: 8f2509521f3a1ddcd010b023b8e8c977f1949fbfce8b72fbba15f109a65be659
font_00_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 5228 bytes
SHA-256: cc1e5c8dcf141a3e9697360379cd82d6c84f777582c9451dbfa30b5cabc21995
font_01_sfnt_off000116b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B6 11080 bytes
SHA-256: f004665d1f3d1f31e85ce3406630159e7fbaec70b71a24880337832118bb985b

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