Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd45b7679abd8de…

MALICIOUS

PDF

75.4 KB Created: 2021-03-06 00:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: de0ad7a66147d58d3eecfde0830d7d56 SHA-1: d0012303d3694ec2656174a83655e4f76ea734a4 SHA-256: bfd45b7679abd8de5362c866baf646cd76e378d0d46f7f4e498e86b5afaedc3f
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, particularly those on disposable hosting with UTM parameters, strongly suggests a phishing or malware distribution attempt. The document body, though truncated and obfuscated, contains text that appears to be a lure related to a "Pr kit for dummies", further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://lozipotod.ru/123?utm_term=pr+kit+for+dummies PDF link annotation
    • http://how2clever.com/domain_information_godaddy092se.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379970/normal_5fc97c45729ee.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/36805379713.pdfIn PDF document text
    • http://igclienteam.com/jurepu9j50k.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/32982101751.pdfIn PDF document text
    • http://nefozufovi.scienceontheweb.net/steal_this_book_author_crossword_clue.pdfIn PDF document text
    • http://beautysale.site/rise_up_singing_cdeu1wz.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/fosejezujazapibemopimub.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/sabowed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_602ee7f5d93ba.pdfIn PDF document text
    • http://bestrongbyg.com/the_kite_runner_by_khaled_hosseinibjiv2.pdfIn PDF document text
    • http://liko-sneakers.com/drawing_exercises_for_beginners_bookv3ym2.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
    • https://s3.amazonaws.com/numunenoji/35404403423.pdfIn PDF document text
    • http://livirava.atwebpages.com/nobiseki.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/filemaker_pro_16_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4c43a4-b270-4b54-9388-a5d6608ad412/what_are_the_aims_of_educational_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9671067-fc30-40ce-b6d3-66e02c4d8db2/cannondale_x_trail_7.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/kepuvoxolonevo.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/computer_lab_assistant_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/inquisitor_martyr_class_guide.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/savadud.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/dilbar_janiya_song_hd.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/79015638589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac176f7-4995-48e7-ac9a-63e2030aec4e/the_giver_chapter_14-16_vocabulary.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_off0000df0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 4652 bytes
SHA-256: c5635a26dd7ff310cd5a687ebbb6a3c9fbd92d454b56e835e9582b6f2c58ed78
font_01_sfnt_off0000eee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE4 10332 bytes
SHA-256: 2c314eb61884ea3c9b2e33afdb3a2272cb2621ffb589de81a50c25bfe1bd6b39
font_02_sfnt_off00011229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11229 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361