Malicious PDF — malware analysis report

Static analysis result for SHA-256 0166fe4414b200da…

MALICIOUS

PDF

67.8 KB Created: 2020-11-24 03:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d85fc73d949af56c64a257ada693e25f SHA-1: 9e039243f8556c2cf5e909cba095a4bcfaf9f91d SHA-256: 0166fe4414b200da069fba231f42e1dd2d53cb9c5e1d811becae54d42e7f660a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'https://trafftec.ru/123?utm_term=robbery+bob+apk+mod+2', suggesting a malicious intent to redirect users. ClamAV detection and ML classification further support its malicious nature, classifying it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains references that align with the lure of 'robbery bob apk mod 2'.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?utm_term=robbery+bob+apk+mod+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5fa029f7bdda3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465123/normal_5fab3b3fef4d3.pdfIn PDF document text
    • https://pujuferot.weebly.com/uploads/1/3/4/6/134657525/figadotololud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464323/normal_5fbac7d9f2394.pdfIn PDF document text
    • https://nilanifaken.weebly.com/uploads/1/3/4/7/134702232/xokib-zakabafabe-wemen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5f8ce3e35a391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f03e1a-da60-4e3a-87f6-39416535d6d1/noco_genius_g1100_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8d9edb-b800-42df-b651-9c48f385ce6a/dapesazixubupewalatesafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37a4a86-a14b-472c-9dfb-a1a1dbfb8de9/70424810780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb39999-7ebf-4819-b993-3f70202cec5b/guide_rod_laser_sight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d522225-e178-4b14-9201-4103ddc8a971/wopenegukewawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50d7507-ef18-4026-954e-243c2fd9c344/internet_explorer_8_portable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6d7dfe-101f-4a73-ad4b-78636a8b0b1a/89968541070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9868ec07-ff8a-483a-b072-62ce058f3d55/93856868079.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_off0000c7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F7 5340 bytes
SHA-256: ae5c4556f645350baaa01a8837fc7e2a14e74ef809d68f167359e295aaf6ad4a
font_01_sfnt_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 12016 bytes
SHA-256: 40a691897755020c7db2406a75e95f54e4d4550a89abe0a1c1fb1cff6a5d39cc

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