Malicious PDF — malware analysis report

Static analysis result for SHA-256 964f02949fbd8fe9…

MALICIOUS

PDF

69.8 KB Created: 2020-11-24 17:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fa25c4fe937269c735ba617a6a12ad2b SHA-1: 1dba1db22f5ec06dd29cd358049aeaa1b9fc0414 SHA-256: 964f02949fbd8fe9fd36d4f214d7aed30c6d9b66ae723f821dd201ee0b972539
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, contains strings related to software development, which could be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/aws?utm_term=add+splash+screen+android+xamarin In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5f9b193a0dd45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489850/normal_5fb99361af5cb.pdfIn PDF document text
    • https://vagovewov.weebly.com/uploads/1/3/4/7/134722861/c287e5.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/takateg/500g_to_oz_butter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8707756d-772e-4c82-a8df-cc1cf7ab115b/diy_deer_feeder_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/43424577680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e487ecb8-e332-4392-a38c-c9282bc4d60a/pabudoxudurawasaxuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f45c96-fa83-44ee-a96b-d3320222bc1a/how_do_you_get_free_apex_coins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9f419d-2a41-448b-be22-e8933d0af09c/dubujukaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ebd3df3-ed47-4d29-b16a-5ab234e9bb15/music_explorer_apk_download_samsung.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_off0000c5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D9 5076 bytes
SHA-256: b199e57611575bceddd40c54b4c0b6ede59846d4c26be0fbf274775332d3dba1
font_01_sfnt_off0000d6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D9 11108 bytes
SHA-256: 893695204ec104cb2d6639c58284fe96542f83fcc5995737245f31f5a9a56a1d
font_02_sfnt_off0000fce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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