Malicious PDF — malware analysis report

Static analysis result for SHA-256 5375651049ed4f40…

MALICIOUS

PDF

74.1 KB Created: 2020-11-21 08:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 02b94dba5dc6737087fbde4f5f5d813d SHA-1: ead89efaf61d2b881139456fd687f39024812c39 SHA-256: 5375651049ed4f404a4b2fef74dddff42a2f018059a2da31f6cee4c55d46d919
156 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to lead the user to a compromised or malicious domain.

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://trafffe.ru/123?utm_term=centroid+of+a+circle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f941d0c712b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448991/normal_5fb595d82ed75.pdfIn PDF document text
    • https://suvenalopevoku.weebly.com/uploads/1/3/4/5/134510495/1552540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_5fa04ad81bb19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5fb871e178c65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f8afe1021021.pdfIn PDF document text
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/vibaret.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5f9c6be925004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5fa8af9d26630.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/dujepav/car_game_unblocked_game.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/89246960891.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/jowin.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/13715945063.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/mebodirerezu.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/nefexoniwizevojoni.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_off0000cb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4A 4740 bytes
SHA-256: fabc5da3336029f1182f491ffb9db537b65375d00581ba4c422c3fd07ee5198c
font_01_sfnt_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 12728 bytes
SHA-256: 5d4e538aa281d5f5dd95ab61b8f14c8c80c4bd7ae06dca5134a172438189c520
font_02_sfnt_off0001059d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059D 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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