Malicious PDF — malware analysis report

Static analysis result for SHA-256 7939cd2741c37680…

MALICIOUS

PDF

112.9 KB Created: 2021-03-10 14:27:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95ca95c5684110d0192179b0e68871fb SHA-1: db01a3d00a1bdf1f3f343d7a73885e96940131b3 SHA-256: 7939cd2741c37680e8f821543434c635a476f075f7f48d3fc2089d37a03e54ad
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external links, with one prominent URL pointing to a site that appears to be part of a link farm designed to attract traffic. The document body, though heavily corrupted, suggests a lure related to a 'Japanese word list'. The presence of embedded URLs and the overall structure strongly suggest this document is intended to redirect users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=japanese+word+list+pdf
    • https://xirixutikudu.weebly.com/uploads/1/3/4/8/134873033/mojazosifote.pdf
    • http://bukezisafa.iblogger.org/how_to_get_certified_as_a_crossfit_trainer.pdf
    • https://cdn.sqhk.co/naziwixolagu/WzJjdjp/amazing_food_facts_2020.pdf
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/baxazuvurobov.pdf
    • http://fuwonetuj.22web.org/milady_chapter_13_review_questions_and_answers.pdf
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/viladusojigagumaw.pdf
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/rakopujuda.pdf
    • https://cdn.sqhk.co/xedasuzefer/0TicWjd/bluestacks_among_us_controls.pdf
    • https://botuwuroxawezu.weebly.com/uploads/1/3/4/7/134713501/dobelafixusavi_dagovidizejodom_fudanonapefe_zifumazatag.pdf
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/7674376.pdf
    • https://tikivumisa.weebly.com/uploads/1/3/5/3/135346314/mixubazeto-sexivosudije.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xazogugikuriwox.rf.gd/75780087390.pdf
    • https://uploads.strikinglycdn.com/files/9eaf32bf-514d-4475-a645-65955e30fec9/ven_seor_no_tardes_mas_letra_y_acordes.pdf
    • https://uploads.strikinglycdn.com/files/74ae2fb0-3b04-489f-b51f-4df511de6b82/how_to_reset_canon_ink_cartridge_281.pdf
    • https://uploads.strikinglycdn.com/files/cb14f92d-a26d-4005-bb62-963cb83a10c4/vaveminazisufijomelimelo.pdf
    • http://siwapulozexudu.epizy.com/mimusowamusobusujufe.pdf
    • http://kutepiguzusudax.epizy.com/marathi_story_book_free.pdf
    • http://zejagal.rf.gd/conducting_a_literature_review.pdf
    • https://uploads.strikinglycdn.com/files/799dce51-3c78-441b-85e6-8993ebedc8dc/sex_education_season_2_recap.pdf
    • http://foripoj.epizy.com/heart_failure_guidelines_uk.pdf
    • http://voxotili.epizy.com/what_were_the_three_colonial_regions_known_for.pdf
    • https://uploads.strikinglycdn.com/files/dd295368-c419-44db-b50a-7f9a8d934467/gatulef.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa1d.bin
08a159a3da5a4924f96814cc80a778bd552b1cf16c9001a6d41227d92e6ec861		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 38468 bytes
font_01_sfnt_off0001716f.bin
677d79c90ae7258821f316834b263ffa529a7cb65a1df58e08425b73eb349423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1716F 4904 bytes
font_02_sfnt_off00018229.bin
d8c0b8436ea8509b8a218d024e2770cad7c87b8da4a400b9f0324bcb3badd65f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18229 11408 bytes
font_03_sfnt_off0001a7e6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7E6 4324 bytes

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