Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7ea6e608098d43…

MALICIOUS

PDF

63.9 KB Created: 2020-11-29 07:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d4e3ff16a859eb09ccb1471f53589d8f SHA-1: bf076ec67ffddf63d02215dc313837f31000553e SHA-256: 3d7ea6e608098d434dbf590c44a69d61f9e3785e82015a2cdaa7e75a1619321f
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, forming a link farm, and also includes a critical link to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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://traffking.ru/strik?utm_term=wifi+kill+apk+uptodown In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407085/normal_5f99c5c25cf83.pdfIn PDF document text
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/ee979680132b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f895471c1dd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5fc2f46372d76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_5fbd774c45d63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f9203eb314a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449776/normal_5fb8b1dfe010f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5fb5b928492cd.pdfIn PDF document text
    • https://nogegomubupof.weebly.com/uploads/1/3/4/6/134614602/8736343.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://s3.amazonaws.com/pevuwarobuvowa/reset_glitch_hack_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/android_versions_list_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/pouvoir_assemble_gnrale_coproprit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5f2fc2-068e-40c8-b491-e8aee0ce4b92/sony_vegas_10_crack_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/zatedamuwiviwi.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/mekaxigufowugarivik.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_off0000b0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BA 4692 bytes
SHA-256: b0c4ad54073505d095539c8bd856bfed698a20cfa0cd77c5bbaa98c950a91860
font_01_sfnt_off0000c0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D8 10768 bytes
SHA-256: d0f6638a2f17732165ab779058b3ba1937b364979336d45b4e0cb0052c0cf1a2
font_02_sfnt_off0000e4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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