Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc28d0aa4d6df8cd…

MALICIOUS

PDF

76.3 KB Created: 2021-03-09 06:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a174d69a16e6dd7245cb2c5a31f7bb50 SHA-1: 20cd79cf8813db621bebfcab784181b6c96b6b9c SHA-256: fc28d0aa4d6df8cd01924ea9fa656d359f68fc81ef3d9459cbd27f090c792745
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to direct users to malicious sites. The embedded URLs like 'http://oneitstore.pro/30046278064xcibp.pdf' are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://dugedepap.ru/wix?keyword=delete+my+yahoo+answers+questions PDF link annotation
    • http://oneitstore.pro/30046278064xcibp.pdfIn PDF document text
    • http://astrology-personal.online/soundhound_apk_modxhuql.pdfIn PDF document text
    • https://cdn.sqhk.co/lusoxepero/igjifX5/bella_vista_golf_course_restaurant.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/lanid.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/fUb4nDd/survival_prison_escape_v3_mod_apk_download.pdfIn PDF document text
    • http://jujekokegolalut.iblogger.org/7484689163.pdfIn PDF document text
    • http://sayfelengs.space/my_darkest_days_ludacris_lyrics24lg4.pdfIn PDF document text
    • https://sanituwinera.weebly.com/uploads/1/3/1/3/131379206/3660816.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/hdVghib/virus_on_my_iphone_10.pdfIn PDF document text
    • http://pubguckazan.com/greenworks_24v_lawn_mower_reviewsmk4z9.pdfIn PDF document text
    • https://venofizemebesok.weebly.com/uploads/1/3/2/6/132681219/bogilubulu_wasoxuno.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/HAyVha3/carrot_cake_recipe_easy_simple.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/4954709.pdfIn PDF document text
    • http://vclean-sale.shop/sekuxobubabamejukukuqvh.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/0hcgjUl/jumpstart_academy_kindergarten_reviews.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/7b1b53f4-d078-48d6-861b-9e8b30a798ab/starbucks_barista_espresso_machine_manual.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_fc6802cf1f7849aa9b441d68fe50b229.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8182029-9f21-4199-b6c6-00ca1bb58524/48252141288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71fd8fae-00e3-4d6a-8049-9f53891429ad/najab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1676014d-db0b-4df6-b2e4-ba8a83fdb90e/what_is_iphone_12_and_iphone_12_pro.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_ad083365656a4a5d88ad70dca019dbc9.pdf?index=trueIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_8c1a9779b3434c369760f7172dedad6c.pdf?index=trueIn PDF document text
    • http://wepirizifomonij.epizy.com/cricket_chirps_and_temperature_worksheet.pdfIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_406ebac1e9b346b8b825c947b5ed1a4a.pdf?index=trueIn PDF document text
    • http://xosekube.epizy.com/82059102246.pdfIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_3c906b5ef98440439ec07a47dac8107b.pdf?index=trueIn 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_off0000ee60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 5244 bytes
SHA-256: 9780b565c84da8c67bf30f80bc49818dc01aec2b25c2b273b128024b1314bc6a
font_01_sfnt_off00010026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10026 10324 bytes
SHA-256: 9948c73bc84751375d93c5cbd05cd6ba999a989936ec193adbe3be47e51192d4