Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61e5d0e600eea69…

MALICIOUS

PDF

74.5 KB Created: 2021-05-14 08:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8d23899153d0d3b7eaf9d38751308ab6 SHA-1: 2e405ebc0bebf60db4f19534b608fb3c5d84441c SHA-256: a61e5d0e600eea69343f765e4396981f98b578ee14d1908100663bc600150fb3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous links on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=garmin+camper+760+review PDF link annotation
    • http://tevajevidiwa.22web.org/zabidudigovep.pdfIn PDF document text
    • http://keruluzo.medianewsonline.com/zinasesi.pdfIn PDF document text
    • https://cdn.sqhk.co/vikaxokaso/dRojbhf/julowuruwezaruxatasisen.pdfIn PDF document text
    • https://cdn.sqhk.co/pejozujemu/hic4hjc/exercises_to_relieve_lower_back_pain.pdfIn PDF document text
    • http://pidusejop.medianewsonline.com/32_inch_sony_wega_trinitron_weight.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaku/0ifhiiU/everfi_marketplaces_investing_basics_assessment_answers.pdfIn PDF document text
    • http://wokodanib.getenjoyment.net/adjetivos_posesivos_en_frances_ejercicios.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/ibgichd/mudefupamavukalazosup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfc0f81-00a5-46e7-8f30-52d63da70f8a/how_to_connect_elgato_hd60s_to_obs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d99ab0a-952e-440b-a7c1-1f0e377cbaf7/nefisawevixesovuwesed.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/gimoloba.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/32233901796.pdfIn PDF document text
    • http://disobaratid.rf.gd/43145773855.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/saucony_women_s_guide_7_running_shoe.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/esquemas_amplificadores_de_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a165da-69c3-438f-8ee1-7cad555882d2/72595729766.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_5afb1ec747be47fdb295100e24699be8.pdf?index=trueIn PDF document text
    • https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_f796d241e678433a8e0bcb7a1e5b0531.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0437402d-7690-4434-bfa0-6bd6883973bb/12546547306.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/checkout_page_template_in_bootstrap.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_off0000e3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 5428 bytes
SHA-256: fa2779a0f334a07658bea322b40eddc0fc8989adce24c0311ebd719cd1f1e968
font_01_sfnt_off0000f675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF675 10828 bytes
SHA-256: 30b696e076cb588c3275469c35d2a6bede34d9f02d8da4d7751479d6bd3a881f

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