Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc8b068d658c9df…

MALICIOUS

PDF

91.5 KB Created: 2021-04-13 11:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0dee94a3c741759264f8be6da0159e23 SHA-1: 8ccde32a55faa1db6afe2bfdd164a04d6d275d05 SHA-256: 2dc8b068d658c9dff3b30199eb54c6c14c0e76990124f1ba478677b6689a1dfa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming scheme. The ML classifier also strongly indicated maliciousness.

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://pelibifir.ru/strik?utm_term=who+plays+lady+edith%2527s+husband+in+downton+abbey PDF link annotation
    • http://iminn.ru/vocabulary_workshop_level_b_unit_3_v3jw2i.pdfIn PDF document text
    • http://kanshoper.site/directory_opus_12ez46u.pdfIn PDF document text
    • https://cdn.sqhk.co/teduwugevoki/gd7whgr/pejepekegeveten.pdfIn PDF document text
    • http://compte-cmbretagne.best/tower_block_stack_block_and_build_towers5m6rg.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/gbjhQid/animal_origami_free_origami_app_origami_folding_bike.pdfIn PDF document text
    • https://cdn.sqhk.co/lopovekis/4iezkhg/draught_meaning_plural.pdfIn PDF document text
    • http://rusakova.space/gamogulipenebapuror3f4t0.pdfIn PDF document text
    • http://chambrehq.xyz/ewi_5000_sound_editor_manual80wiu.pdfIn PDF document text
    • http://fruitslope.online/what_is_the_purpose_of_corporate_social_responsibility_ukmoj6u.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/ihjicNY/dream_machine_game_ending.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/c0iaham/50055439623.pdfIn PDF document text
    • http://wejnpowk.space/purulomutofowulusetx5fbl.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/78951eb0-9cbd-4919-adb0-bbbc78e9f9c0/2015_club_car_precedent_body_kits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c62288-e263-4271-af07-9651fe48e5db/nodag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbddf32-e356-4868-8b41-7fdfdaa053ce/67391253985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27c71f1-055a-41ed-8a08-b81708e5ad20/paint.net_for_mac_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe707598-fbc5-4b4a-a9ea-0d2ecde63ddf/what_does_the_code_ae_mean_on_an_lg_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d37a28-692a-4915-9a72-c2930fd2aeae/86668354632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c953f3a6-929d-4efa-a089-71f455c7d7d8/gmat_prep_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854e1130-6436-4804-97fc-38939a3926fc/xogokipoxeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54bef210-6976-40be-901d-5ee4e6121e41/39934213525.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_off0001274b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274B 5332 bytes
SHA-256: a6403c0d5162023fae3dd633f0b95f551df0a3442af339e4eed3649274455b59
font_01_sfnt_off00013988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13988 11672 bytes
SHA-256: 9cc6c096805763ed66dfb780cd94e345faa61d4e4d3a853699c86d19f3394cf5

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