Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab087295538325c3…

MALICIOUS

PDF

80.4 KB Created: 2021-03-24 02:17:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6bed30a9dde647323a2676c1dd4bb169 SHA-1: 58512ad35b3fa0797c4dbfb037bcf63f7489c88b SHA-256: ab087295538325c3a1f55b440bd7a1bf46c23def7ff104b654c28a688e0e4b81
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by a machine learning classifier and ClamAV, indicating a high probability of malicious intent. The presence of a large link farm, with many external URIs pointing to disposable hosting, suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://gimoguvi.ru/strik?utm_term=bosch+silence+plus+dishwasher+troubleshooting PDF link annotation
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/29fad5fd.pdfIn PDF document text
    • http://kemytbok.xyz/43325546059ku8eu.pdfIn PDF document text
    • http://purubifo.medianewsonline.com/57611813229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_604fd68d3f8e9.pdfIn PDF document text
    • https://gutirupivib.weebly.com/uploads/1/3/4/7/134768574/rebamuruxuk-visiw.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/acquisitions_incorporated_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483097/normal_5fe7db510195d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_604354b4b328f.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/time_value_of_money_formula_with_example.pdfIn PDF document text
    • http://forexgeeks.net/etiquette_of_marriage_in_islamkh47d.pdfIn PDF document text
    • http://hotsales-com.xyz/33043244206orwea.pdfIn PDF document text
    • http://taptopbot.com/namoxezinmbl6i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_60481bcabd0b0.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/sevaz.pdfIn PDF document text
    • http://shopyou.online/what_does_navajo_dine_meanv3e2g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5fdc49d3dc5d8.pdfIn PDF document text
    • https://kuvukodu.weebly.com/uploads/1/3/1/4/131453249/3678693.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miganuvag.myartsonline.com/is_buying_a_used_mustang_a_good_idea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776cdc64-4235-4d87-9937-1faef3eacc63/how_to_pair_skullcandy_sesh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/488426c5-98ed-4681-b1ad-ff678041cf97/metal_gear_solid_3_snake_eater_pcsx2_pnach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952bbb6f-f626-4750-99ec-898394593be7/trials_of_apollo_book_5_free_download_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9db1f68-af30-49f9-a02a-42173540f7e0/wilderness_survival_shows_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b2d57f-adf8-44b7-8edb-352077641a26/how_to_check_login_locations_on_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c200e0f-c1e0-4961-a357-52592d33d643/86582225488.pdfIn PDF document text
    • http://maretubozewugi.myartsonline.com/dewetupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fbae064-cde9-481c-8af7-efef98078a2f/how_long_does_it_take_to_issue_a_letter_of_credit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f93af10-4613-4326-9d68-8f3d27e34c98/what_are_inferential_statistics_in_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca550dd-036f-4e31-afa2-609f9d9d2810/kepunafuziponolipupe.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_off0000fc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6F 5616 bytes
SHA-256: f2334555f3258eb9fca4cc084412c8b2656a90e35892dfbeeeed34370dadb258
font_01_sfnt_off00010f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8D 10592 bytes
SHA-256: 7679a358dc01c5755d8049f225a566070ba6f03fa4eda143729327662733f245