Malicious PDF — malware analysis report

Static analysis result for SHA-256 340c64ae0335f273…

MALICIOUS

PDF

130.8 KB Created: 2021-04-20 01:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c2d6e8ff12725d49f11b7a3f9730f4c5 SHA-1: 13f503a662048f63f137a2f47de00fb089a9e37b SHA-256: 340c64ae0335f2732ff8bb8ecf570d65ce856852537b29be08fdd932fec97ef5
244 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, one of which is identified as a malicious redirector. The document's content is deceptively presented as a guitar chord chart to entice clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=printable+guitar+chord+inversions+chart In PDF document text
    • http://juwupexutaval.mywebcommunity.org/71843797855.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/hdojihf/hakuoki_kyoto_winds_sanan_walkthrough.pdfIn PDF document text
    • https://tipuzivi.weebly.com/uploads/1/3/0/9/130969377/sawavogib.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/zawoga.pdfIn PDF document text
    • http://punejew.mygamesonline.org/flat_stanley_books.pdfIn PDF document text
    • http://xazupadapafow.mypressonline.com/aksara_jawa_dan_pasangan.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/hbQydij/samsara_game_hints.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/jdsGicP/zigewurowiw.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/hhhjhjf/best_freebie_sites_uk_2020.pdfIn PDF document text
    • https://ledosixekesi.weebly.com/uploads/1/3/4/3/134313849/537777.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://mijovutotukedes.onlinewebshop.net/65115793196.pdfIn PDF document text
    • http://rilimopukalus.rf.gd/hoi4_man_the_guns_best_infantry_template.pdfIn PDF document text
    • http://putetudufotu.rf.gd/what_is_free_cash_flow_used_for.pdfIn PDF document text
    • http://fafiwokewe.epizy.com/23387995810.pdfIn PDF document text
    • http://kuxoxokazutuv.myartsonline.com/car_bill_of_sale_example.pdfIn PDF document text
    • http://topazipimobol.epizy.com/bolapamiwomala.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B87 5284 bytes
SHA-256: fd6addbeee58a6f8ecaae082914d645356db65c6bdfd5f3a0658f6c545fb99b9
font_01_sfnt_off0001ad68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD68 12688 bytes
SHA-256: 0d552e86fd1c2858a66d19395323747473aa8c5179e270e09bc35d6a63284cf6
font_02_sfnt_off0001d83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D83C 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208
font_03_sfnt_off0001ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED23 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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