Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc336172b8138b9…

MALICIOUS

PDF

81.3 KB Created: 2020-12-26 10:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1c5d81c3b42cee1f1a5aeb28d01c9d5a SHA-1: 912991c28d3af090bf27617be7a5df4524459d38 SHA-256: fcc336172b8138b9464aa05c9db8d8fb859bc38ce57819f4c7d2a3cb5c5a48ca
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, many of which point to known malicious redirectors or link farms. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the embedded links are the primary attack vector.

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=nfl+cheerleaders+salary+lawsuit In PDF document text
    • https://julupovopanar.weebly.com/uploads/1/3/4/7/134732987/4818939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460465/normal_5fe59c485d7f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425915/normal_5fcf45f47c4f0.pdfIn PDF document text
    • https://fuvexowigirupog.weebly.com/uploads/1/3/4/8/134896800/8416386.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://uploads.strikinglycdn.com/files/cbf55695-8b97-44ae-a80d-8d563d504347/mases.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/crazy_frog_free_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f414b3f-1c7a-4bbd-97cb-bc3e65129414/42007712988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c02b2d1-97ea-4b64-bd2b-fceced1cac4b/65443195033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f420f2dc-2fd5-4767-8ae5-674b3b0532b3/balowipez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf61a44-a055-4989-8e38-ab81474d23e9/quincy_junior_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278af6ee-43ba-42c4-88b3-a0fab7d87ddf/71180844043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e2f550-5cd6-4131-9fdf-9a8611046183/14125145235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a685151a-93a9-4d62-b0a5-d37e5d55c30a/xogap.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/cisco_asr_9000_bgp_configuration_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e769d1e8-1220-4210-b5a6-3aeff8829e6d/two_step_equations_in_words_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8027f0bf-274f-4fe9-9880-4be09b1eb8a0/redoselefofagakowazas.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_off0000f3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B0 4936 bytes
SHA-256: ea6dee90394a81085d39331bb254eaa28fe4c42ab89e158d993ebb2c0b3e1c6c
font_01_sfnt_off0001049d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049D 10324 bytes
SHA-256: 32bbf3689436e8ffc4cd5e111a554a2e57df40b4766f92018613528780fed47b
font_02_sfnt_off000127f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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