Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d37814878a473bd…

MALICIOUS

PDF

78.4 KB Created: 2021-03-27 11:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 22ea34ed39724c53c410deabe8db178a SHA-1: bd036cf8697a3d6c030bb1f26d9c0230f1f3c4ee SHA-256: 8d37814878a473bdb9d63068106a2de0c9ae124da0ebe0c699bfacd0aa25bd66
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains an embedded URL that redirects to a suspicious domain, likely serving as a lure for phishing or malware distribution. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=braun+coffee+maker+manual+kf6050 PDF link annotation
    • http://dibopisol.iblogger.org/kudidovifazipuj.pdfIn PDF document text
    • http://botodowur.iblogger.org/6682123412.pdfIn PDF document text
    • http://gokutep.22web.org/auto_root_android.pdfIn PDF document text
    • http://oficialshoes.site/is_the_an_accent_on_tu_in_spanish_keyboardwuj58.pdfIn PDF document text
    • http://gouliwer.online/package_news_report_definitionis186.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9cc02d22-446e-415d-9686-6e49aadcb3b3.filesusr.com/ugd/aa6a08_8fcde6ed7dcf41a58a0d7dab621118cb.pdf?index=trueIn PDF document text
    • http://xanobokapi.rf.gd/94820259219.pdfIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_5d7881332ad24594a8625ab92a95a088.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f828a4b9-e73d-4219-a33f-607d6cfe1593/20030480596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8233ed-5fd1-4e17-816a-059acc9d8dfe/what_is_the_best_counter_depth_refrigerator_on_the_market.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e50ef45-0482-43a4-9167-8e8ba9fa5721/nefunumigudagupekino.pdfIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_687be7eaaa4e462fb80012cbed5989d3.pdf?index=trueIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_2060f8bd975f419c923fa745a1e1e64a.pdf?index=trueIn PDF document text
    • http://mufejerawuvolej.epizy.com/76849180685.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_42702ee6b4a549b7ad147538c55ecccd.pdf?index=trueIn PDF document text
    • http://magikid.epizy.com/assam_police_admit_card_2018.pdfIn PDF document text
    • http://jikafazasakojob.epizy.com/redmi_airdots_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56136c48-b7f9-44b4-a2ff-67b27e7e7c36/watch_beautiful_creatures_2000_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db529a28-0115-4c09-89b3-b26778bcfbd0/plantronics_c054_user_guide.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_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 5384 bytes
SHA-256: 8d0cc0da769d83c1026b590a19c99630efa5314ecd3787bbd688c12d5a39bdb1
font_01_sfnt_off0001060c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 10728 bytes
SHA-256: 195656470ebcc0200e9b7043b6c03005e91d94690ccc7e15eef1267b0015f3bb

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