Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4df780a89ab5dc…

MALICIOUS

PDF

88.6 KB Created: 2021-03-21 11:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4954384168f81aee0593fa39f8de53b6 SHA-1: 5b143a12a8bf51a277fb96078319c357b6849dcc SHA-256: 7d4df780a89ab5dc8e907e76818f095020629397231061388053dc37f2d2bc52
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains a search term related to car prices, which is likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/strik?utm_term=toyota+se+2020+price PDF link annotation
    • https://cdn.sqhk.co/vofonowul/Fxiajjg/20542698601.pdfIn PDF document text
    • http://fofikotopavabe.iblogger.org/44662004379.pdfIn PDF document text
    • http://kolejuf.iblogger.org/doctor_letterhead_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvifilezaja/hjd9jdb/lumijibi.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/1HjcicI/sefazojipawuserulu.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/ii4jbGr/download_redream_roms.pdfIn PDF document text
    • https://cdn.sqhk.co/bomunerafoju/hb2gial/xewixana.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/axibiag/motor_vehicle_service_notification.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/hadia7x/defexibufifaw.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/hfyzMIH/4154442526.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/3keKmxK/zezotijabejob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_02ca55b3b222431da616deec794b8ed1.pdf?index=trueIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_deaa59c3dca844d29890aa1e837c364c.pdf?index=trueIn PDF document text
    • https://71fc3d66-43b2-4ae0-adc3-dfbcdf8b5360.filesusr.com/ugd/6605a0_f69528ef491c430bae6046faaa667087.pdf?index=trueIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_bf49b0866ae3436698972ec0265f3b33.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_79a02a324bc246d68981dfc138320fad.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_c4605b4d4a2a4961a8e5d0545f5f2e7b.pdf?index=trueIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_2d7e243bf1b644389e8299b038d52bb4.pdf?index=trueIn PDF document text
    • https://c0e8410b-c394-4b36-8083-179878a46647.filesusr.com/ugd/d4b1dc_2230d6bcc5ab42f3958c204b30ab8d7e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f4cbc0-57a1-47d6-86df-be1d2a070a45/sodastream_directions_youtube.pdfIn PDF document text
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_04d059af5a694d739de21e12c7c05159.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_9890b86e44b34d268622db2975e47410.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0566462-b900-435b-8bbf-33f7ea168bb9/ms_excel_formulas_list_with_examples_download.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_off00011a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A88 5220 bytes
SHA-256: f0973dc62d84c0e0feb87e400f083964916f6b4664f9b646dc905918bb9c3619
font_01_sfnt_off00012c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C63 11888 bytes
SHA-256: 668939208e453611b2b61ea467d3abf32aecb53ec280587f423b3c9d028f99c2

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