Malicious PDF — malware analysis report

Static analysis result for SHA-256 005fc8bacf639833…

MALICIOUS

PDF

70.2 KB Created: 2021-06-11 21:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 413392f07ae0cdd8139a56186b97b377 SHA-1: ab1a035840ecf2f9b32caa1abcefcbaf3c6384a7 SHA-256: 005fc8bacf6398338066b948096168043f153efbdc6b2324f4bc7170f9e19c5e
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains text related to 'Cisco meraki mx60w manual', which is likely a lure to attract users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://oniceh.ru/pbw?utm_term=cisco+meraki+mx60w+manual PDF link annotation
    • https://riragipus.weebly.com/uploads/1/3/4/3/134358734/dibolokojitis.pdfIn PDF document text
    • https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/wojebupalov-sojirez-ligonabofa.pdfIn PDF document text
    • https://fuvodaxe.weebly.com/uploads/1/3/1/3/131379021/jerufib_jitekowixoki.pdfIn PDF document text
    • https://tineminelebon.weebly.com/uploads/1/3/1/6/131606156/zanavemisabupepojiw.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/kuxipitaxasagofikexu.pdfIn PDF document text
    • https://sudodufutela.weebly.com/uploads/1/3/5/9/135960501/gozukowajifezuji.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/fatizawarogari.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojoxevom.pbworks.com/f/48959833253.pdfIn PDF document text
    • http://niraxaba.pbworks.com/w/file/fetch/144912270/bender_gestalt_test_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bd3f97-79c8-4c65-826c-32f8575a6034/how_to_scan_a_document_from_brother_printer_to_computer_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd624112-42bf-4658-b049-dd304300e590/miele_fully_integrated_dishwasher_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c78585f-39e8-4f12-b1a0-f2d884b2382b/how_to_set_up_water_softener_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a4783f-3c45-4c77-a5bd-daa22c3ccd45/mipipebolusixenifekewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b3a314b-e0c3-47fb-ad6c-c62fba3a72ca/janopan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/636ba231-f70f-4f69-9713-801861e05dbd/can_you_eat_eggs_on_the_wild_rose_cleanse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36498ac5-b294-49fa-9f9b-d71204bea104/didemukamepatufalijivir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb9c83f-cc8b-49a7-a232-a9a022f52c3a/zifato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b72fa19-68ef-4ad2-a71d-0a5df85e4bf3/uniden_bc355n_mods.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/f/duzogusidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6840448-f021-4859-ae54-96219231e74d/78193194417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb37d6e7-ed57-4f79-90d9-e657ba40d391/what_is_humanistic_approach_in_teaching.pdfIn PDF document text
    • http://dagomiwavi.pbworks.com/f/zigufulawububisegigitesem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50175a23-430d-4423-85d7-888185589518/vezetagudapiwodaguv.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_off0000d623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD623 5372 bytes
SHA-256: c6fd4f128cb26954647411b73de09be09a9dd98b838060d2c90b1813e3705872
font_01_sfnt_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 10284 bytes
SHA-256: 1bb31ffeb34fc957f1f90eadaf69b5b652a46ab1c621269d2e1947fd3a3acba4