Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ec2c66e5bc5af3…

MALICIOUS

PDF

73.7 KB Created: 2021-02-24 10:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b07307a44f525526e62d0de3d47cde14 SHA-1: 6e1aa9ab9fa8e5214cb49f28ec68ce6a253f4294 SHA-256: 68ec2c66e5bc5af353104590e8b59f70ef6665e5023caf2a5512f09b4b5bf04b
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially corrupted, suggests a lure related to a 'Whirlpool gold microwave convection oven manual'. The presence of numerous external URIs, many pointing to disposable hosting and employing UTM parameters, strongly suggests a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to redirect users through multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/strik?utm_term=whirlpool+gold+microwave+convection+oven+manual PDF link annotation
    • http://future-techno.ru/2011_chevrolet_aveo_1lt_manual_hatchbackubsqt.pdfIn PDF document text
    • http://ig-support-service.com/bioenergetics_4mwas3.pdfIn PDF document text
    • http://souve.me/suduvubipayigkk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469638/normal_5feafa5a7a828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_5fdb022830c5f.pdfIn PDF document text
    • https://cdn.sqhk.co/gupukutolet/nhbxIjf/zombie_survival_game_zombie_game.pdfIn PDF document text
    • https://napufifibadabe.weebly.com/uploads/1/3/1/4/131406817/347820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_602a8f3c196df.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/ganetodadefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407795/normal_5ff7a2648e271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413117/normal_600246f6b4eb2.pdfIn PDF document text
    • https://pajuxosam.weebly.com/uploads/1/3/0/9/130968950/3018411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497697/normal_60347dbe9e3e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_6028400893a46.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/lowubufax.pdfIn PDF document text
    • http://sollabs.xyz/what_are_some_examples_of_biotechnology_based_products2tus4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422658/normal_6016044a8a5df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_601be48faca4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/jazipunerebivowipi.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/the_last_airbender_movie_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/wunexa.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/comcast_email_not_working_on_android.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_off0000e1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A5 5472 bytes
SHA-256: 3f8f19bc5b5a48b0252544f8468684f420103d2098a6d46373df8f1171fb9acd
font_01_sfnt_off0000f434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF434 10832 bytes
SHA-256: 8add5ee2b3addc14c746c7f9ddbb80466cb0271eaeff3b5bdd56ab7f91a78d79

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