Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6eb01a4109e6875…

MALICIOUS

PDF

88.2 KB Created: 2021-05-30 04:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ab08ba4b1391810e9cc5735a07a9d8cb SHA-1: 5cdae5cca6d35919d00a870eefe937f1d12e6f4c SHA-256: d6eb01a4109e68752eb17d19ac6ede2899e6f71bd0bb90f8e21cc7e9183ab607
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and external links point towards an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://midufefew.ru/123?utm_term=ziarat+e+ashura PDF link annotation
    • https://vunubudewodazuz.weebly.com/uploads/1/3/4/3/134340329/kunosub.pdfIn PDF document text
    • https://satumumitexa.weebly.com/uploads/1/3/4/3/134347851/tedivogedik_tilusubute.pdfIn PDF document text
    • https://wilepera.weebly.com/uploads/1/3/0/7/130740018/2372720.pdfIn PDF document text
    • https://miwidikanizi.weebly.com/uploads/1/3/4/0/134016908/bewobamulilof_gevixozilukoko_nabosuso.pdfIn PDF document text
    • https://fekolulowezomo.weebly.com/uploads/1/3/4/5/134593542/68406377.pdfIn PDF document text
    • https://demijogukif.weebly.com/uploads/1/3/1/3/131382539/goboludogula.pdfIn PDF document text
    • https://nopogevoxipati.weebly.com/uploads/1/3/1/4/131410158/a15dbbd1c60ca.pdfIn PDF document text
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/76947e.pdfIn PDF document text
    • https://fupixadig.weebly.com/uploads/1/3/4/0/134096542/a4addd.pdfIn PDF document text
    • https://kuvuwivozud.weebly.com/uploads/1/3/6/0/136091804/lujabolupotuna.pdfIn PDF document text
    • https://xobijuveja.weebly.com/uploads/1/3/1/6/131606615/61e3ad.pdfIn PDF document text
    • https://nikovazof.weebly.com/uploads/1/3/2/6/132682709/217a46b4b21d38.pdfIn PDF document text
    • https://sijudunewofas.weebly.com/uploads/1/3/4/6/134696620/645df25d45.pdfIn PDF document text
    • https://kazazurijufom.weebly.com/uploads/1/3/0/8/130814205/2229475.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/7fe2a480-4636-4e9b-9772-e50bf70f112f/husqvarna_240e_chainsaw_chain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae16a373-8e6b-4535-a66e-3fcb217e17e6/the_norton_anthology_of_english_literature_the_major_authors_ninth_edition_vol._1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ccff01c-de73-4b0f-9384-a1485ade483f/trials_of_apollo_book_2_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac588bf-1fc0-4b0a-9812-9e5e320a62fb/witojekaledomurilogudop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49958191-b562-4db6-980e-4cf99901d7be/is_andrea_roth_related_to_tim_roth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f53c098-0dc8-4665-be45-94de74746252/is_nintendo_ds_discontinued.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21df0b53-9e81-4c85-a901-597a1c794951/5200699931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b427237-75f0-447f-bc0c-2135e874a37a/what_are_the_nine_main_informational_text_structures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e012c3-5431-4fbc-ba11-3c8052d77f9b/96876641830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3c5f85-a6a6-486b-bda4-cc7603f9ff3c/xubowube.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012895.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12895 24172 bytes
SHA-256: 1734269ac61be9b01368a91400dc8709a1f7e73f7fb01f971eea5f2f9b75df1e
font_00_sfnt_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 4700 bytes
SHA-256: 5400ee180f76eb660855e93e5ff5e7a1fc1dfdf71e271f41510b8266e116c010
font_01_sfnt_off0001048a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 10544 bytes
SHA-256: 629293f501c413bf4731dd13a270a9288936862a3ec6a79fbce6fc6dfd4b8b9f

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