Malicious PDF — malware analysis report

Static analysis result for SHA-256 34df6c89b0211e84…

MALICIOUS

PDF

80.8 KB Created: 2021-03-28 16:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d24d8ccfdd66601c71f47ae5a0b9fbda SHA-1: adf44cf33bd9e412afe87d9d9cae2d2f1d9a7b28 SHA-256: 34df6c89b0211e84a0c0dfb12c2eb6f118bfad3f2e77490c3acc210f28b16c87
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to a Cuisinart food processor manual. The presence of numerous external URIs, including a link farm on disposable hosting, indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=cuisinart+dlc-8+plus+food+processor+manual PDF link annotation
    • http://nezowigivomi.scienceontheweb.net/7737389374.pdfIn PDF document text
    • http://fuvidevifa.scienceontheweb.net/12577844930.pdfIn PDF document text
    • http://tophomework.space/46603071045u5x1y.pdfIn PDF document text
    • http://clobuss.ru/ziroxitesakapm8l2s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477409/normal_600a6cafd5b0a.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/flexible_dieting_food_list.pdfIn PDF document text
    • http://yogait.space/compra_la_verdad_y_no_la_vendas_estudiosa7ew9.pdfIn PDF document text
    • http://xbet1.fun/volunteer_protection_act_of_2015vo6to.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_6042b5b216ca2.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/cirque_du_freak_darren_shan_summary.pdfIn PDF document text
    • http://lofitner.buzz/the_how_of_happiness_summaryj2tz5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449968/normal_5fc854426d080.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/37526917878.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/debamijizozexo/rizokefisasojevufunaj.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/ffxiv_botanist_leveling_guide_50-_60.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/zotuvorot.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/71286829009.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_3f537b8418604ca7b238d183657c30bc.pdf?index=trueIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_cd69f0aee2aa45c2b0197d334c4b5633.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_9bc64431d55f40f88c7b99ef48aaf439.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_b379b315e0574da5a249cba737e68dd6.pdf?index=trueIn PDF document text
    • http://falariwupap.myartsonline.com/18771629094.pdfIn PDF document text
    • http://dirulibas.onlinewebshop.net/dolch_sight_words_list.pdfIn PDF document text
    • http://redifigikutusoj.myartsonline.com/life_after_death_free.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_off0000fd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5D 5432 bytes
SHA-256: 621928d083fa2bbbb59f65c5e98057d4b672b459fdf71cd8adba7c3b76041f08
font_01_sfnt_off00010fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC4 11052 bytes
SHA-256: 6d0f0b836d98be9b464996efe1cbb589c37624b7b4ddbc207d28eb834ef4a310

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