Malicious PDF — malware analysis report

Static analysis result for SHA-256 447e71a618e18de5…

MALICIOUS

PDF

67.0 KB Created: 2020-12-17 21:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 66a77371ee6000b3c02aa2b87e3893ef SHA-1: 3dbfe4d213ff9bb35a0f67e85b9fdeefc149dd6b SHA-256: 447e71a618e18de5519fee69a44465cc469128c9c65bf214301f97374c70e293
214 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be SEO-related content, suggesting a phishing or scam attempt. The presence of numerous external links, including one to a malicious redirector, indicates an attempt to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://ggtraff.ru/123?utm_term=pickleball+camps+for+beginners In PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/2503880.pdfIn PDF document text
    • https://taxufizewafodo.weebly.com/uploads/1/3/4/4/134477277/gifuva.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/zuwimadaneb/split_lip_rayfield_bass.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c87788c99b6d37a67a80/t/5fc1b64cbc819f1cf418abe1/1606530638317/nlp_the_essential_guide_to_neuro-linguistic_programming_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/kronos_timesheet_vumc.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/brita_water_filter_pitcher_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad035d01-7c32-4c34-b5c9-f33eb546cc93/gokowegeboxotajezukekaget.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/45285645101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad68e0c-a195-4658-97eb-6adeb92b7a2c/suwibamivumiwud.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/30444561136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9933004b-6b67-454b-b82b-5032a91b3313/dekosemipugupi.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/ir_spectroscopy_chemguide.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_off0000c6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DA 5540 bytes
SHA-256: e968bc576998331041af5bd0a55f5959a52d5e8ff0e9675ec98d99f46d975408
font_01_sfnt_off0000d99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 11036 bytes
SHA-256: 468806c71e079a7f028571090627b8b8606c6e9726083563fd340ccd7e12b9e1

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