Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66e7b35869a885f…

MALICIOUS

PDF

77.6 KB Created: 2021-05-01 01:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1ccd03e1dca6505ae7eb9067f3a1e968 SHA-1: 8cc5d1bbeb7caf969c9e0388dbb18e063ce21463 SHA-256: d66e7b35869a885fbd83f4d2014ee5ccbecd43bcb4d7b989ec543f452b7fe180
134 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, including a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports this, indicating a lure to download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://botokaw.ru/strik?utm_term=pathoma+2019+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417813/normal_603aa98568403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426423/normal_5fe1ab06d6b3d.pdfIn PDF document text
    • http://lifizix.22web.org/maithili_nach_program_sheet_basant_bhag_4.pdfIn PDF document text
    • http://tulumobutu.22web.org/73888990974.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://pirajog.epizy.com/what_mattress_has_the_best_warranty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d47f0b-0e03-4dd4-884b-6e2509974ff8/what_is_the_best_fence_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/89675101996.pdfIn PDF document text
    • http://fefogisupiruro.rf.gd/lunafafepaxamaro.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/animate_cgaffinetransform_translation.pdfIn PDF document text
    • http://nudifezidezi.rf.gd/english_grammar_placement_test.pdfIn PDF document text
    • http://linanimeb.rf.gd/15182252357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db7cb12-f358-410f-b227-6fa8b9b35b3d/best_way_to_listen_to_music_while_running_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c2143a-ff89-4b18-b0be-bd93afec97b9/lg_mini_split_remote_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/prius_c_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e4aee1-3e39-46e8-8357-883db657a367/what_is_the_mood_of_jack_and_the_beanstalk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb16c7b5-d87b-4806-ae7c-a410c308565b/how_to_clean_single_serve_keurig_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47df241b-8a27-45a8-a2ea-a270c22af4ec/sisigag.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/248487617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80240ea7-7d15-4057-8bbd-87c0fff01526/imusa_pressure_cooker_4.2_qt.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_off0000e488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE488 4824 bytes
SHA-256: ad2eb3b6e68adba304546c1b48bf385ff732055e7147d68dbb0a7c3ecd61d703
font_01_sfnt_off0000f4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E4 10800 bytes
SHA-256: d9ba84200e78d384c809bcb4b9dd27dac5da2fb988196e182972b7258a4c7390
font_02_sfnt_off00011993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11993 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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