Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee173e4425f15e4…

MALICIOUS

PDF

76.5 KB Created: 2021-04-02 18:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c570f5709be8b1bfeec26a8dedf0ea08 SHA-1: d8d57cd6ec739a4190f6351a9b490acdeb3542f2 SHA-256: bee173e4425f15e4996b322f7630a919411293111d6a4a823a7ea74b9d60da73
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to various websites, one of which is identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=mcgraw+hill+wonders+3rd+grade+resources PDF link annotation
    • http://gididowofugu.iblogger.org/65894905127.pdfIn PDF document text
    • http://shop-you.xyz/43462152632fb7km.pdfIn PDF document text
    • http://datingdate.site/ghatna_chakra_reasoning_book_free_download1c4qz.pdfIn PDF document text
    • http://bestcreditcheck.info/45779777270jksua.pdfIn PDF document text
    • http://kersita.fun/music_notes_tattoo_smallkannu.pdfIn PDF document text
    • http://gaydating.world/who_plays_zed_in_aftertlpnx.pdfIn PDF document text
    • http://profoto22.ru/how_to_work_out_surface_area_of_a_2d_shapepzeij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunaxixe.rf.gd/77674857703.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_dcb1f0e7462947f49b79391aa06a708a.pdf?index=trueIn PDF document text
    • https://87098103-4d08-48bb-90a6-807b0ef734b2.filesusr.com/ugd/1f49de_ef6b72fdb290403fa476c45e7404ba14.pdf?index=trueIn PDF document text
    • http://fofogagad.epizy.com/the_economist_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/formal_letter_to_unknown_recipient.pdfIn PDF document text
    • http://pamubaj.epizy.com/sad_pic_girl_in_love.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/69671618221.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/juxakirewin.pdfIn PDF document text
    • http://sinodigewenewe.rf.gd/when_attitudes_become_form_london.pdfIn PDF document text
    • http://duloduxu.epizy.com/binary_and_hexadecimal_number_system.pdfIn PDF document text
    • http://modunatotuw.epizy.com/bingo_card_template_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/69480418372.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_d023064d2d0a4da89438e7a21d221656.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_83246b815c9443dba832b397b6549b82.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_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 5464 bytes
SHA-256: b3d4837ab57e3d9dcdcc7ef0af1b224abba4531eb0677bcf63e773bacce89d39
font_01_sfnt_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 10832 bytes
SHA-256: 90132ee374c4fb61e9c0ce627e1eb51f58a333b9bca331bc964e5873c723ff49

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