Malicious PDF — malware analysis report

Static analysis result for SHA-256 847cfafbe7f08720…

MALICIOUS

PDF

83.4 KB Created: 2021-03-24 23:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ef7a063895e06f5aebe1e4d60f25444d SHA-1: 1099fb2c0bc785bb43ba8c1954df27884ab8fec9 SHA-256: 847cfafbe7f08720a543c964b5604d01be0e8e5656a440324f9a15a45afc2fe6
186 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 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://dafemum.ru/wix?keyword=iron+man+3+full+movie+download+720p+filmyzilla PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419001/normal_6010ac3bad085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_601d97f37a8fb.pdfIn PDF document text
    • http://selizixid.iblogger.org/gaxoxajapelutage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446287/normal_602a02e9d5878.pdfIn PDF document text
    • http://zajapokel.22web.org/canon_in_d_piano_sheet_original.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5fe82b2cc80a1.pdfIn PDF document text
    • http://malapiwo.66ghz.com/pemidujifelaroda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470985/normal_5fefbf966aab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fd3da489ecca.pdfIn PDF document text
    • http://zovopoxojun.iblogger.org/crack_ielts_in_a_flash_reading_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_4ba6ae3ff22d47f581838b6d582e62d6.pdf?index=trueIn PDF document text
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_4487d6cc69bf478bb055d1a545233cba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisazabe/vawedizis.pdfIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_6b221da09646497e8612ffb0cc559a35.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_c54d9731255d4a68a224fec0a3ee9e37.pdf?index=trueIn PDF document text
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_23840e565c8540869b58ba87928e76e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e1173a-faf7-4d47-82a9-1ba9a02ab3bd/liwopikeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42659f2e-17e1-47ff-8963-0b2243e52ba8/77959257609.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/xituwazatoriwi.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/antrenmanlarla_matematik_1_zm.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_off000106b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 5768 bytes
SHA-256: 990a850178cd8d05b8c0e88ed38ae3515804b297da5860e9cf83d8c77c065e2d
font_01_sfnt_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 11516 bytes
SHA-256: bfea55d3bbcb1edb59fff394fd68ab22fcf9b0d4e07ba7413ec9f26f02b848cd

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