Malicious PDF — malware analysis report

Static analysis result for SHA-256 7767dfa4bbb40811…

MALICIOUS

PDF

78.8 KB Created: 2021-03-14 19:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a3d98405b408027ad1bf5282b6f294dd SHA-1: ed2850b50a91ac41478a494491e5bd1c7d1aa4b7 SHA-256: 7767dfa4bbb40811119d304389690c56a7821dff20fa932689e8a522ef6b5610
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. One prominent URL, 'https://maypoin.ru/wix?keyword=the+last+stand+union+city+unblocked', suggests a lure related to a game, potentially to disguise a phishing or malware download attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/wix?keyword=the+last+stand+union+city+unblocked PDF link annotation
    • http://nigavereke.mygamesonline.org/71866428558.pdfIn PDF document text
    • http://lnstagramoriginal.com/time_bound_higher_grade_option_formlaedm.pdfIn PDF document text
    • http://dk-inc.xyz/22612176214vk0at.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/how_to_get_rid_of_a_cystic_pimple_before_it_surfaces.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/a_photographic_atlas_for_anatomy_and_physiology.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/geruze-dubulapagifig-wisepujotepo-jilipebe.pdfIn PDF document text
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/5060067.pdfIn PDF document text
    • http://liketsven.xyz/gross_motor_milestones_for_18_month_oldtawiz.pdfIn PDF document text
    • https://fuwodeku.weebly.com/uploads/1/3/6/0/136095673/relupovegu.pdfIn PDF document text
    • https://zulanamojo.weebly.com/uploads/1/3/1/0/131071117/cef68966e8b09.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://sinusudixuxuwad.atwebpages.com/post_civil_war_reconstruction_us.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb24cfa-bf58-43c5-98ae-fc5e3573561a/what_is_lean_six_sigma_yellow_belt_course.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/what_are_the_elements_of_film_scorer_do.pdfIn PDF document text
    • http://romakilax.myartsonline.com/katalog_ball_bearing_skf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81597b3-7134-4154-ac21-3a98c7f4a355/the_explosive_child_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999fb5ca-92ce-4df2-996a-c54d5d6cbbce/13379613347.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/49631485530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1bf43f-5368-44b2-b81f-2824a68b825b/corningware_percolator_how_to_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f58996a-693e-4840-aa30-fcfc398e57fd/what_are_the_two_types_of_outline.pdfIn PDF document text
    • http://sobibuxasegisun.rf.gd/dusewigagonegivabawavuzu.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/nusuk.pdfIn PDF document text
    • http://tatifamajerub.epizy.com/basic_statistical_analysis_9th_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 5068 bytes
SHA-256: 6b605e7acad91df6c6e038d3338e3c3c39182c59b4f537fac8c4ece40349734f
font_01_sfnt_off0000fa9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9A 11060 bytes
SHA-256: 7b00514e8dfd485d91f42fc91d02af3f59b43270daba7114ce90341015ea0bd7
font_02_sfnt_off00011fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA7 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71