Malicious PDF — malware analysis report

Static analysis result for SHA-256 463983f1f7c08b48…

MALICIOUS

PDF

77.2 KB Created: 2020-11-20 22:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eb4f4a602a37557cd8e0a9312f338f0c SHA-1: bb4c0a4f29d176a16a39a2bb71062bdd59d8bff5 SHA-256: 463983f1f7c08b48db22dd6eae25d16ea16fe41ee9c2f0bb1622cd0e488511d0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a link farm, with the primary URL being https://traffnew.ru/aws?utm_term=super+mario+63++2019. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=super+mario+63++2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444875/normal_5f9f20ec5aede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f8ae740140f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447079/normal_5fb7e8ad1984d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f8e0c9eaced7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414331/normal_5fa223f1cbef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_5fa70ebb1142a.pdfIn PDF document text
    • https://mokufomaduw.weebly.com/uploads/1/3/4/6/134600220/1382149.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/lixuduwonifa/java_software_structures_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/vw_caravelle_t5_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece8296a-abaa-4965-aea8-1369a44a8308/shingaling_a_wonder_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1501c6-835a-4d8b-89e5-d2e70e18caab/logic_grid_puzzles_easy.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA62 5660 bytes
SHA-256: 836f6b23e3a413f24b18ae88688efcd1e9c7bb8d0bccc07a36a1fec909e1f8b3
font_01_sfnt_off0000ed80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED80 10608 bytes
SHA-256: 79df8aab004505daded2d533d28d208a9220614b168e73524cd052915227b6ad
font_02_sfnt_off00011201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11201 16296 bytes
SHA-256: 5663d8578250f824917609d3eb76e3efe1318610afd7b77be9e2258255c4b957

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