Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b08c3554778eb87…

MALICIOUS

PDF

80.1 KB Created: 2021-06-01 11:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3184fee5a5e542cd47774d8f2eb5eb56 SHA-1: e644366d023d32f4ac4377580e74cfbfde783926 SHA-256: 3b08c3554778eb87f90f975e97a7f1eb27b3aa776242e7077f6ece1e755fe2da
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to unknown or potentially malicious domains, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pistant.ru/pbw?utm_term=piggery+business+plan+pdf+south+africa
    • https://roxasudafuj.weebly.com/uploads/1/3/0/7/130740166/punofobosiv.pdf
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/f64360cde.pdf
    • https://teribizekejuxes.weebly.com/uploads/1/3/5/3/135391999/tugokoxadub.pdf
    • https://lusovajilabijix.weebly.com/uploads/1/3/5/3/135351537/fuxegore.pdf
    • https://ladukupubavar.weebly.com/uploads/1/3/0/7/130776836/wexoraxot.pdf
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/8345845.pdf
    • https://fomutifimo.weebly.com/uploads/1/3/4/5/134594787/9979033.pdf
    • https://rirudelibuwa.weebly.com/uploads/1/3/1/6/131606594/lubegumotubudavugev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b010cf5c-86a5-4c3e-ae00-287000274484/netgear_n600_wndr3400v3_speed.pdf
    • https://uploads.strikinglycdn.com/files/36126fff-bfee-4705-96d3-f58fc73959fd/domufi.pdf
    • https://uploads.strikinglycdn.com/files/4f36daf3-5c80-4652-b134-59a835893c3c/python_programming_examples.pdf
    • https://uploads.strikinglycdn.com/files/452fd5d0-e194-4e37-87fb-18541b278a7e/android_bootloader_interface_for_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/54d30482-2192-4a98-8617-ab9d9795b724/jufuvuzipubuj.pdf
    • https://uploads.strikinglycdn.com/files/fc8558e2-85c2-4993-813b-da9a8872ea61/watch_batwoman_crisis_on_infinite_earths_part_four.pdf
    • https://uploads.strikinglycdn.com/files/e2748ef5-637c-434b-9971-23889b543c55/symbols_in_the_book_crucible.pdf
    • https://uploads.strikinglycdn.com/files/027794d6-83b0-4608-bb78-d75e9001ab04/fiche_de_lecture_la_gloire_de_mon_pre_marcel_pagnol.pdf
    • https://uploads.strikinglycdn.com/files/47c66564-458b-477b-96e8-f7f14991bf2a/what_are_the_types_of_indexes_in_oracle.pdf
    • https://uploads.strikinglycdn.com/files/9bf5b8df-753f-4c11-be77-975f2db1b77a/34959424682.pdf
    • https://uploads.strikinglycdn.com/files/8fc39726-81b9-4823-926f-145f3d34b271/2008_dodge_avenger_issues.pdf
    • https://uploads.strikinglycdn.com/files/7aaf0368-eaa0-4fac-bf13-5152ed776927/how_to_train_your_dragon_2_netflix_canada.pdf
    • https://uploads.strikinglycdn.com/files/d855938e-a9c2-4c0f-94a9-d24e14ba2fc4/84709092718.pdf
    • https://uploads.strikinglycdn.com/files/599d6187-4655-4340-b224-60d9e485c280/what_is_the_resolution_of_orpheus_and_eurydice.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6cf.bin
54b9a577e68136029b09fc14b00913a5a2d9c7fb0e0bee1f9f3da7d56ebcfd85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CF 5660 bytes
font_01_sfnt_off00010a13.bin
aa32cfadeecc8e87775ba12e767197379aaf6733c483a52c8124219f829346c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 11708 bytes

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