Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1f41ae9e0f4bf9…

MALICIOUS

PDF

89.3 KB Created: 2020-11-21 17:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2f14f952ff3337d16909df81b8258e72 SHA-1: 3517736e82ddef94c96a9b4967342c8b1975a1c6 SHA-256: 1a1f41ae9e0f4bf99be472aae3c502f639129ce8b8b734720d22394540dbee64
214 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple critical heuristics as a malicious redirector and link farm. It contains numerous embedded URLs, with at least one pointing to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links suggest a phishing or malicious redirection 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://gettraff.ru/123?utm_term=skyrim+community+uncapper+requiem In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f8ece5e7d753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461484/normal_5fb2905ee9f0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5fb03d8c125cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_5fb34ecd4bd14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f8e1d0c84d45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425760/normal_5fb8579d3ebd0.pdfIn PDF document text
    • https://sajesugepila.weebly.com/uploads/1/3/4/4/134467456/xulexigugusotobemid.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/faluzotixupi/tri_county_family_medicine_gowanda_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed479eb7-896d-4d31-bd4d-042c04994730/xojuvebidanokurefuforo.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/60204989752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45519c2-9afd-4e66-bffb-f3e031f76671/pafuxadifufufo.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/59842915851.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/98299470991.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_off000121de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DE 5264 bytes
SHA-256: 122e8998e4cbde146e156ec61e704e8105524dd717dc551f765a1a5c592d33a7
font_01_sfnt_off000133c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C3 10672 bytes
SHA-256: 109f987bedf31679d1879031f884b410cfc7646e3f4f6241629cbe9569ae4db6

Open this report in the interactive analyzer, or submit your own file for analysis.