Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b4fa1fa7875eb9…

MALICIOUS

PDF

76.5 KB Created: 2021-03-14 22:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f64dae0158f42655b59b4d5cca847586 SHA-1: 653ff52086009ca3017504b8fe16452e443774ee SHA-256: e5b4fa1fa7875eb95b99146334703527fb79de246765e2fa53d1c43dbd9c204a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious links within a large number of seemingly legitimate ones. The presence of embedded URLs suggests an attempt to redirect the user to potentially harmful external sites.

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 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://pelibifir.ru/award?keyword=printable+calendar+2020+south+africa+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388608/normal_60031f1dd5321.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405929/normal_5ffacc9d1ab02.pdfIn PDF document text
    • http://wisecredit.info/lesomiwagizizizawakolz3m0.pdfIn PDF document text
    • http://bestsaleshopin.xyz/nf3_intermolecular_forcesmw7xu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_601b81646401c.pdfIn PDF document text
    • http://mosquito.codes/how_to_bypass_a_fuel_shut_off_solenoidlwg59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5fd829a9995c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380068/normal_5fcf0a7d99dac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konajif.epizy.com/79038047963.pdfIn PDF document text
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_b444917822b44954ae48215018aecf89.pdf?index=trueIn PDF document text
    • http://lenixad.epizy.com/fishman_loudbox_mini_acoustic_guitar_amplifier.pdfIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_11dd600a4bcc4809841180eb331009ea.pdf?index=trueIn PDF document text
    • http://guvubaxi.epizy.com/abecedario_letras_grandes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c421332b-503f-4397-a94e-a18692f18a03/gusebezuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d026b52d-a2ca-4a0f-b37e-1d847a0d85a1/zanetazexipebexebem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc914892-a179-4b9a-b159-214e7b149d80/diary_wimpy_kid_new_book.pdfIn PDF document text
    • http://wedojixote.rf.gd/58979470942.pdfIn PDF document text
    • https://1cb08e36-ab12-4eb2-b22f-c8474a88e118.filesusr.com/ugd/c34eac_03c89af859764a1daa4f50ec91b75d10.pdf?index=trueIn PDF document text
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_b5c8a69215264e57b9e0cfe93ad992c0.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 5660 bytes
SHA-256: 66669abd87ce3a2ea2fdcdd276d6ed016a5d64dd53c30787ca63ccdd738feec9
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 11088 bytes
SHA-256: 3abd4ea3aa4569a42a36e0e8322f9a4ede76811051ad1605044267932e97251a

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