Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d24e4544c174d24…

MALICIOUS

PDF

70.7 KB Created: 2021-03-15 19:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 347f31a84b2a012bf18c15a1248381b1 SHA-1: cbe22ce410b94f3a84c3b769428aa0a53c5d06c5 SHA-256: 3d24e4544c174d248f4d36265b6fc6a16fab550dbf8f96fa4d5f5422883f2c0b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The document body, though heavily obfuscated, contains strings related to 'magic tricks' and 'wkhtmltopdf', suggesting a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=how+to+do+magic+tricks+123+go PDF link annotation
    • http://neo-tp.ru/insanity_max_30_workout_calendarz429j.pdfIn PDF document text
    • http://copyright-securityx.com/chevron_annual_report_20186xka4.pdfIn PDF document text
    • http://4gusevshop.space/degabupixizuvimupitublexx0.pdfIn PDF document text
    • http://it50life.pro/guvodutudevawvylm5.pdfIn PDF document text
    • http://jobediniberine.scienceontheweb.net/63381953327.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/51381111268.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/murmurs_of_earth_the_voyager_interstellar_record.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383921/normal_60015637c3130.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/wavezinopix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381544/normal_6007dee930a10.pdfIn PDF document text
    • http://fitnesspack.net/rifegelunodizozu23o94.pdfIn PDF document text
    • http://forecast.bet/way_back_into_love_piano_sheet_musicfjuyj.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/828d4e17-998a-4d20-8c4c-7e9c969a7ddd/15756388355.pdfIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_2b102773dbe247608a89e62f413ec1cc.pdf?index=trueIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_eeba03d1ded94488af91efc24f847dcf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/330d4006-3c50-4ad9-8863-7dd04b2d653c/good_career_development_goals_examples_for_teachers.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_1c376eddc11449b5b2c5b5c4cc7c416a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec91aa31-1cda-45fe-bce8-8d51da60a534/56379751976.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_64da1dbb929148c4a321bee3c89b3e7e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/964ce9dd-b36c-4b6f-9200-f0e9ac4fddce/athenaze_book_1_3rd_edition.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21E 5692 bytes
SHA-256: f140952a9aecf2fc73f1cfed741a1282e05615a80dce994adb2d6cd2739a3594
font_01_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 11204 bytes
SHA-256: 61e733bb55e67cc4dad15bdd3906be3b96273ba1959d6dc70dbcf833c32667ec

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