Malicious PDF — malware analysis report

Static analysis result for SHA-256 58912d18e48d5386…

MALICIOUS

PDF

66.3 KB Created: 2020-11-17 20:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7966ef29fe27628e63399a6f68692a8e SHA-1: e08d01a5ea4ce942cbf7310a388190fff9803517 SHA-256: 58912d18e48d53867c853038c644a882bfa89edebe57b9c0560a72b2d4a7dd78
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a PDF link farm, with one primary URL pointing to a suspicious domain. This indicates an attempt to direct users to malicious content or phishing sites. The ClamAV detection and ML classifier further support its malicious nature, suggesting it may exploit vulnerabilities or deliver a payload.

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://traffnew.ru/123?utm_term=aaron+watson+songs+on+the+radio PDF link annotation
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/4119218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_5f935339c6dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5f9a4bd17876d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f90f71345eff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_5f9bfe4cc1075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f903f8537f10.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/kezemiradigu/tagemepixag.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/comilla_board_hsc_marksheet_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e4dcadb-f6ae-40bc-a7f7-c45c4684d467/lutajetijuduteledan.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/chhattisgarh_river_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/impact_of_globalization_on_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfab1e46-6727-4634-bf5e-b12ba4c88047/vakusisikuzagimuse.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_off0000c646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC646 5136 bytes
SHA-256: 34fcdfbba6e09634b2a8684ec46c96de4a1852307cf1378ffe57360b0d32719a
font_01_sfnt_off0000d7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C6 10856 bytes
SHA-256: ac739c68209d0ea520ff84650d4c7522a25ca11f639bd466598c27864c2f6a4f

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