Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa26d3f49f7ab00…

MALICIOUS

PDF

78.4 KB Created: 2021-03-02 03:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c817cf5737fa0c1665a07aa6871f04fd SHA-1: 395fbab305351bcbab14a0401b8d0f9f2358ab76 SHA-256: baa26d3f49f7ab00329a89b541e2d10539eae1319c6fd9864d2adc806ff01710
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content, but the presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/strik?utm_term=kentucky+fried+chicken+song+lyrics PDF link annotation
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/rebademujudo.pdfIn PDF document text
    • https://wuxorazaw.weebly.com/uploads/1/3/2/7/132712222/kepikewumi.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/1711251.pdfIn PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/vaxem.pdfIn PDF document text
    • https://wulapoledonuker.weebly.com/uploads/1/3/2/6/132695240/4ace8834c.pdfIn PDF document text
    • https://mixojokujize.weebly.com/uploads/1/3/4/3/134387696/5711344.pdfIn PDF document text
    • https://sizuwebon.weebly.com/uploads/1/3/0/8/130814729/dobevesekorabobeze.pdfIn PDF document text
    • http://sluzhba1.net/guion_literario_plantillawtamt.pdfIn PDF document text
    • https://gekuraneg.weebly.com/uploads/1/3/1/6/131637503/gowulixajenumefamoko.pdfIn PDF document text
    • https://vewenaloviriwu.weebly.com/uploads/1/3/2/8/132816087/ralometavemif-vebapesezil-jakuvi-dekirikororowab.pdfIn PDF document text
    • https://vezisadorudaruj.weebly.com/uploads/1/3/4/3/134349324/zusezefotar.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/blood_bowl_2016_rules.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/vovuzize/relajifenurulusafanobapi.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/partes_de_un_generador_eolico.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_off0000e772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE772 5088 bytes
SHA-256: 833a0e7f583fc4bf496a8c6b04bfbe45a0a86fc6ca67d105f0ba5a4e62f55c08
font_01_sfnt_off0000f8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 11064 bytes
SHA-256: d87ade710ffc876055f9ff501a81b61935b745fedd680a9a77472e9f3c5df204
font_02_sfnt_off00011e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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