Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94d0a3dfeec3a13…

MALICIOUS

PDF

77.8 KB Created: 2021-03-13 19:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2164684f5b9242cd489eb3c7b1334716 SHA-1: 9440ce5548196db4a4a7d13d2dd1f2f16e711713 SHA-256: e94d0a3dfeec3a1359f9431adb7738f7a6fa133245505cad632b70486fd45ee1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=grief+therapy+techniques+pdf PDF link annotation
    • http://7lessons.fun/has_voyager_2_left_the_solar_systemc1agu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419424/normal_60475281ba494.pdfIn PDF document text
    • http://am-sound.ru/884150091746sah0.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/ef796ab7a9efe78.pdfIn PDF document text
    • http://tiktokfrance.fun/guia_de_estudio_ipn_2019_gratis05vhn.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/jodojaleped.pdfIn PDF document text
    • https://futinubub.weebly.com/uploads/1/3/5/3/135328842/gakesawexaxi.pdfIn PDF document text
    • http://br1.red/black_and_decker_toaster_oven_cooking_instructions0jxms.pdfIn PDF document text
    • http://rumukisizupew.iblogger.org/sonobedezifurusumukafe.pdfIn PDF document text
    • https://ridawixesij.weebly.com/uploads/1/3/4/6/134660161/11f20020.pdfIn PDF document text
    • http://fruit-ital.space/fotalazisixiwopinipopowanebrmx.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/samupimovavop_rufofu_xokedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_602275a36cf14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475716/normal_5fec7ef52fd04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5fd8dbc46e971.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_0af2f2aa1e4b4f7db27b5f195e5bec16.pdf?index=trueIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_0f709e5950ea4642bbf2deb257adece6.pdf?index=trueIn PDF document text
    • http://bakevojedu.epizy.com/56529465667.pdfIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_b85e5388405041a4ad3a9c8243ffcc36.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 5472 bytes
SHA-256: 38587c871c1e7b7e13a8adf8d5d03954f619c219eabe2b9c1e0069f600122f1f
font_01_sfnt_off000106e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 10448 bytes
SHA-256: 037bba56872e89174af4c4c9f7f3225def8fbd5225e7e8cc5049192824496410

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