Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c6c833de930376…

MALICIOUS

PDF

91.9 KB Created: 2021-02-19 05:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ea053876c69622c6215165b75c647cd7 SHA-1: 1b2ab9bf156652303d3c491515a6c9c668226431 SHA-256: a0c6c833de930376ed03420584bc5cfb2a2c4742448ff33630035cbfe6f1fa3d
194 Risk Score

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/strik?utm_term=sony+sa-ct60+sound+bar+not+working PDF link annotation
    • https://cdn.sqhk.co/gonolesuzam/X262ic4/24345662201.pdfIn PDF document text
    • https://cdn.sqhk.co/lufezeralon/hdmig71/lowujudes.pdfIn PDF document text
    • https://rubovumalez.weebly.com/uploads/1/3/4/4/134458479/173941.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/ajcUuRz/georgia_governor_election_2020_candidates.pdfIn PDF document text
    • http://5gusevshop.space/88930574901de23z.pdfIn PDF document text
    • https://jirafaribov.weebly.com/uploads/1/3/4/5/134599686/vuxuzibegamax.pdfIn PDF document text
    • https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/79a96ef3c8bf.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/Vidjf8p/mudiponigobuwo.pdfIn PDF document text
    • http://probmake12.xyz/bleacher_report_nfl_score_predictions_week_7nq7qk.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/1gbidex/baxijotolod.pdfIn PDF document text
    • http://nepifenimet.iblogger.org/47034591951.pdfIn PDF document text
    • https://vazoxavaver.weebly.com/uploads/1/3/4/8/134863882/333276.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://gozegatunefafet.epizy.com/karcher_power_washer_1800_psi_reviews.pdfIn PDF document text
    • http://mafukifuwu.epizy.com/google_sheet_filter_or.pdfIn PDF document text
    • http://kagiweluxipo.epizy.com/organic_chemistry_alkynes.pdfIn PDF document text
    • http://manovotiduzabes.rf.gd/wugakuwikerifowiwabare.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_off000117bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BF 5668 bytes
SHA-256: 47e7ef8e95c1653455abc2206f49493ceafd71f80bc55f527e1116dc475befad
font_01_sfnt_off00012b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1C 12524 bytes
SHA-256: b89d14cc81a858679ff7966077ed8e883f1a9bfad676b410d859bddaf701608f
font_02_sfnt_off0001544a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1544A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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