Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e475c6f17885f9…

MALICIOUS

PDF

81.7 KB Created: 2021-03-20 18:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0f792b9681eefddd097cb8da367f2d17 SHA-1: bf927b9eae3bcf92bd162bf6aaff4f712de3b617 SHA-256: 02e475c6f17885f94705467fb7d0d15617cd1b732ca2c5c4c86fbfd38d0c3ed3
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous external URLs, many pointing to disposable hosting and utilizing UTM parameters, suggesting a phishing or SEO manipulation tactic. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=premarital+questions+for+christian+couples PDF link annotation
    • http://mylic.ru/android_portable_battery_chargerb6f3s.pdfIn PDF document text
    • http://bluebadge-support.com/73899154706zvmlv.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/wukabeguxafadabimapot.pdfIn PDF document text
    • https://jubolovewo.weebly.com/uploads/1/3/1/4/131453214/bijoxupijukanos.pdfIn PDF document text
    • http://kifejuja.medianewsonline.com/sarasagodiluwez.pdfIn PDF document text
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/287233.pdfIn PDF document text
    • http://uabiomanix.xyz/5949269380203mpg.pdfIn PDF document text
    • http://antonioit.space/how_do_you_check_the_transmission_fluid_level_on_a_2013_chrysler_town_and_countryxgbg5.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/f92c715b-8d71-42cd-ac1d-505a240e63f7/what_is_a_functional_fitness_workout.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/rifopidilojusetalowofar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457db191-6a5d-43fa-8647-014fa186070a/lulumamifamepebiva.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/canada_visa_forms_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f49de7-0d81-428e-9388-12bd0e805ccf/mazufilikojofejupifovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b75721-6fc4-4b26-96a0-428eba927b67/restaurant_general_manager_salary_singapore.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/how_to_teach_basic_paragraph_writing_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/47531335398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3edc99d2-8364-42b9-a181-cf23203c7565/68428107208.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/92153404047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e27a1056-2c3e-40ae-ab3e-bf64b3c648a6/juwoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65683158-30d7-490a-b862-717ff1330e40/asp.net_mvc_angularjs_login_form.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/tiritanoxupasakalotanibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a3c784-0d96-43f6-a959-e3d5afa76e9f/how_to_use_fonts_on_cricut_joy_infusible_ink_transfer_sheets.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_off000100f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F2 5384 bytes
SHA-256: 77147122208ad5a8c060db2a6ae9762e099e6824d0b19f94a5a74b6d3513991b
font_01_sfnt_off00011316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11316 11224 bytes
SHA-256: 2392ca016e4e3f260c9ddef0d9979fcfa5902d403bb464181be538d393e40a79