Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad518e6f80228be…

MALICIOUS

PDF

88.5 KB Created: 2021-02-23 06:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 881a8e87789ec22544893bfe1a9b5f65 SHA-1: d9a57f6fe9b0d19273bc8957ddcbb2c755268773 SHA-256: 0ad518e6f80228be9c54e4fc1acf5a564eb1cebb31449f0034db317c4c7754ed
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure and a large number of external PDF links, suggesting a link farm. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous URLs, including a malicious redirector, points towards a phishing or malware distribution attempt.

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://yafferge.ru/wix?keyword=macgyver+lost+treasure+of+atlantis+123movies In PDF document text
    • https://static.s123-cdn-static.com/uploads/4383678/normal_5fe50f4077757.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450730/normal_5fcfaf6375d5d.pdfIn PDF document text
    • https://deneresibixu.weebly.com/uploads/1/3/4/6/134662350/6bdce9a8db09e.pdfIn PDF document text
    • https://jewolitef.weebly.com/uploads/1/3/4/0/134016805/buxuwogov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fd23bd550cad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5fe043da22b89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462732/normal_5ffbafab59f45.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/6337303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_6019c5d8d61db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwunepozu.epizy.com/adp_workforce_now_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/microsoft_scanner_and_camera_wizard_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/8328798204.pdfIn PDF document text
    • http://bixudaxekolen.epizy.com/conair_1875_hair_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/59038831792.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/car_wash_icon_free_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/gewurusojebidag.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/nespresso_aeroccino_4_milk_frother_instructions.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_off000119c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C8 5716 bytes
SHA-256: a0137e74d3975b2759c12028d1a3ab458c31fb30d24bc45b29a61a9e4bce5f73
font_01_sfnt_off00012d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D53 10952 bytes
SHA-256: daca7d08865cdaa616745cefe6b4b7699cc10ce9a84a864a5a39acbe328cf081

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