Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc1e7be6f6c9af4…

MALICIOUS

PDF

86.6 KB Created: 2021-03-21 21:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d8894682b636b254d6545b4db5e2538d SHA-1: 8ed213edb5847366c4d5e417a79410be32eb5208 SHA-256: dbc1e7be6f6c9af440693b0f7ebb4380f16dd9c0bb78f1006e2d1626e58081f9
126 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 ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=emergency+preparedness+merit+badge+counselor+answers PDF link annotation
    • https://cdn.sqhk.co/tivuzofep/bpYjgge/i_gladiator_money_hack.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/handbook_of_linear_partial_differential_equations_for_engineers_and_scientists.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/hanhgib/39043866061.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/zejeva.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/zitumebun.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/lobisisozudotibavuxalide.pdfIn PDF document text
    • http://wersita.fun/645531475327zmx6.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/32859520430.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/yaesu_ft-2900_programming.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/summary_of_a_little_life_includes_analysis_hanya_yanagihara.pdfIn PDF document text
    • http://lasns.fun/13142154410zvrks.pdfIn PDF document text
    • http://emmetrix.net/19597039149yuwuz.pdfIn PDF document text
    • http://bavimobuxadu.medianewsonline.com/broyeur_de_branches_sur_tracteur.pdfIn PDF document text
    • http://pubgmobiie.com/can_a_thermometer_give_a_false_high_reading9miu2.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/tefulejekenulonelaroboma.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/99604133032.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1923694d-0d34-4221-8f5a-014d3860534c/86861105784.pdfIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/gauteng_budget_speech_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a76cdcc8-a056-4b20-b47f-652c2e87fc1f/xomakezefukaverej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5afba8f6-62f6-42e3-abd7-9fc33a6e83b7/lekuwevobunoxod.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/berlin_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7e7a64-1301-45fc-9760-7187f84326a7/punajotezababifupaxiwuli.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_off000109ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FF 5684 bytes
SHA-256: 071e8f45402ee7a94a2460b9071f7195598970ffebed12a5334214f84e130397
font_01_sfnt_off00011d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4F 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off000125df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DF 10524 bytes
SHA-256: e6a09aabea203e848214f1bf74c0ef4cb538d24cbf0caf1a217aa579f878d841

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