Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec01acb32ee58d84…

MALICIOUS

PDF

65.1 KB Created: 2021-01-06 14:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0630f0bdd8a9c10980a4246c2ad55c1a SHA-1: 4e1df80628cd51f17f54f4130d5ad1ca847bd50b SHA-256: ec01acb32ee58d84d89121b7c5c79dbf4b68acfabf24f934849180bac56715f4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. One of the primary links directs to `https://cctraff.ru/123?utm_term=fnaf+2+characters+full+body`, which is flagged as malicious. The presence of numerous links suggests an attempt to drive traffic to potentially harmful sites, consistent with phishing or malware distribution campaigns.

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
  • 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.
  • 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://cctraff.ru/123?utm_term=fnaf+2+characters+full+body In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/cf1f08dc23ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407081/normal_5fa1a13ac6bc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_5faf30a5e6b78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416304/normal_5fc66c4832e8b.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/jinodofafexa.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/5546d6f5-7607-405b-b0b1-7e417c6af9bb/monster_truck_show_2020_magyarorszag.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/half_wave_rectifier_circuit_diagram_and_waveform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f16273-ae44-4b84-8e4b-5abf23d95417/aladdin_drive_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9cf051-be1f-4ad7-bfba-095fdf4d29ff/avengers_endgame_full_movie_online_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/302c1ccd-9e6f-4638-8256-e15d5d10ffbe/scientific_management_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a81c9a5-11bb-47ad-8e0c-b2e23a2033b8/javumobujipepefegelukobas.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_off0000c2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D9 5436 bytes
SHA-256: ded736f53388ed788e6e0faaad27fc3f957cdd07ec160d727b75930e4092659e
font_01_sfnt_off0000d55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 10104 bytes
SHA-256: d438edb63f915fd77e363741ef9095861ea89fdd3d90fa68ad71abec762a5758

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