Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1baf8ba3270a13…

MALICIOUS

PDF

109.9 KB Created: 2021-03-10 21:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3a1eab102aa709d1e866455fee2af4fa SHA-1: 41906e02393e34dd2c4b81afb06a0cb374510b55 SHA-256: 9c1baf8ba3270a13bd77ad88d527ab1b74111ae011500431e82341a34ad12d53
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or domains with unknown reputations, indicating a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/123?utm_term=disturbed+sound+of+silence+lyrics PDF link annotation
    • http://lubozamesorox.iblogger.org/is_amazon_rainforest_an_ecosystem.pdfIn PDF document text
    • http://videohost.space/what_is_the_best_cancer_fighting_dietjiyaq.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/69180492601.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/90052807283.pdfIn PDF document text
    • http://tubipegutadob.iblogger.org/contract_termination_template.pdfIn PDF document text
    • http://static-start.top/is_the_g_shock_watch_waterproof28ao5.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/29955676098.pdfIn PDF document text
    • http://nuvuzujujafusu.22web.org/dark_souls_remastered_builds_guide.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
    • http://xumugipetoje.epizy.com/73424395497.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/96067548721.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_84db2303a3a54e6ea71586e36f6dfd58.pdf?index=trueIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_62513142ff794488bc0f6543f547bf6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/bubble_answer_sheet_20_questions.pdfIn PDF document text
    • http://zimifad.epizy.com/lean_six_sigma_green_belt_certification_cost.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/7117174099.pdfIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_842913186b4c47f5934e55a0689f143d.pdf?index=trueIn PDF document text
    • https://a16eeaf1-ab09-4fb7-bdbc-3ebfa24c279d.filesusr.com/ugd/03042f_bade57d1976047afa5788ba2dac29cfa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefunupu/fozox.pdfIn PDF document text
    • http://dokelegusipodi.epizy.com/sokaxawalu.pdfIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_c65931415ee7457bae2b034d415b89d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/godewumazek/bezizazufudesina.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001420a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420A 8348 bytes
SHA-256: 8fc4dd5746f76d219e85af5c79b13d675f5b622537b03b4c4a57a935a1c75912
font_01_sfnt_off00015e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E39 4928 bytes
SHA-256: b494fcc579ece6a816cc08972bbaf5ae232777f6fe293bfb9e852e1f1f259da9
font_02_sfnt_off00016f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F0E 14584 bytes
SHA-256: 19807bd3f61c569cba618ba7fc86d98f5efc93fdc716bfaacc46068017495ce7
font_03_sfnt_off00019bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BB0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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