Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae74dea9cec8345…

MALICIOUS

PDF

62.9 KB Created: 2021-04-08 22:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f642bfe80a2962831e2fe75c3ba29be9 SHA-1: 117e387f0aeabfc66b9a6c4ad41eb12b7c4a0d73 SHA-256: aae74dea9cec8345198cb06990d47838bb1699c011d3247c6ffee533b9781700
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to seemingly unrelated PDF documents, indicating a link farm or SEO manipulation tactic. One of the primary URLs, 'https://bologen.ru/strik?utm_term=heinemann+a+level+french+grammar+practice+pdf', is flagged as an external URI. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9735

Heuristics 4

  • 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
  • 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://bologen.ru/strik?utm_term=heinemann+a+level+french+grammar+practice+pdf
    • http://vajokopopozikem.medianewsonline.com/ceramic_materials_science_and_engineering_c._barry_carter.pdf
    • http://dororuminaxa.mywebcommunity.org/rabuwofalubuzaginozofu.pdf
    • https://fulopovesaj.weebly.com/uploads/1/3/0/7/130740112/jajiwidegupon.pdf
    • https://kokopepexepu.weebly.com/uploads/1/3/1/3/131379351/jamabamemenubu_kibope_verutoguxaguzop_jikale.pdf
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/kolaloxirefu_nazazuxovot_tonawefodaxu_pexenijarop.pdf
    • https://beperupofifu.weebly.com/uploads/1/3/1/6/131636755/bd59f7795e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ef871412-600a-49a8-a84c-3d6f10b3245f/jokufujuxafi.pdf
    • http://nukilaba.myartsonline.com/what_is_the_difference_between_180_cst_and_380_cst_fuel_oil.pdf
    • https://uploads.strikinglycdn.com/files/1faa4776-d693-460c-a45f-99cb90b6d141/48046304618.pdf
    • https://uploads.strikinglycdn.com/files/838fbaaf-c46a-4e84-978a-dce64651de9c/present_progressive_tense_worksheet_for_grade_6.pdf
    • http://zijedan.atwebpages.com/flawed_book_free_download.pdf
    • https://uploads.strikinglycdn.com/files/ad95367d-6888-4d50-8cc8-08afab78e707/zimiw.pdf
    • https://uploads.strikinglycdn.com/files/3aee2702-9784-4657-831f-4c26dda6025c/razufaro.pdf
    • https://uploads.strikinglycdn.com/files/ba600215-f672-44e5-9197-18f442ff9586/how_much_does_it_cost_to_get_a_cat_neutered_in_ireland.pdf
    • https://uploads.strikinglycdn.com/files/82b35f34-bc7b-4a07-a823-12e8ac48e3c7/xudaxibunixuwu.pdf
    • https://uploads.strikinglycdn.com/files/42704e0d-e08a-4b21-83ef-bf7c972beef2/88844943149.pdf
    • https://s3.amazonaws.com/pegebunov/label_animal_cell_answers.pdf
    • https://s3.amazonaws.com/tazopaju/emulator_android_linux_ubuntu.pdf
    • https://uploads.strikinglycdn.com/files/00725c5b-ad09-4120-b3dc-a383d7fdcc25/cloud_atlas_book_review_new_yorker.pdf
    • https://uploads.strikinglycdn.com/files/7b523a84-8523-4edb-a68c-b518f7b1f9b5/37150684088.pdf
    • https://uploads.strikinglycdn.com/files/cfe0017f-69f2-4492-b56f-cf267235ce62/kobalt_26_gallon_air_compressor_manual.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf01.bin
5089a56179e599e5e1836efb80f6b379fb606412564ecdba5d260dbf4e8ca33c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF01 5412 bytes