Malicious PDF — malware analysis report

Static analysis result for SHA-256 75111f688a75f55e…

MALICIOUS

PDF

88.1 KB Created: 2021-03-17 00:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df16ff3417b52f85541ba1af6a84a451 SHA-1: de90482ba131e458855465697361b837afbdf3a8 SHA-256: 75111f688a75f55e6207205ef9c19d364ae1b8abcc4cbac79b0b9a28439ddeda
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including those on disposable hosting and link farms, suggests an attempt to redirect users to malicious content or phishing sites. The document body, though partially corrupted, contains references to 'food allergy list pdf' and 'wkhtmltopdf', potentially serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://druttle.ru/123?utm_term=food+allergy+list+pdf
    • http://viniveba.mywebcommunity.org/free_download_mp3_ost_the_heirs_full_album.pdf
    • https://static.s123-cdn-static.com/uploads/4479718/normal_5fe3041e202e4.pdf
    • https://cdn.sqhk.co/nikofejujel/hbFZHhf/situwoludetefanukilikege.pdf
    • https://cdn-cms.f-static.net/uploads/4493597/normal_5fdafd8251b9c.pdf
    • https://cdn.sqhk.co/tukutabu/tAyghhf/haunted_heartbeats_horror_otome_romance_novels_mod_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4365662/normal_5ff0e5c63c6c4.pdf
    • http://jedilinosur.mywebcommunity.org/add_text_to_existing_using_python.pdf
    • https://cdn-cms.f-static.net/uploads/4393624/normal_60294bae1e69c.pdf
    • https://cdn.sqhk.co/kezomerameki/YIgehdv/get_likes_on_instagram_free_trial.pdf
    • https://cdn.sqhk.co/wejafivelij/fB7SvId/mefusevanewititobef.pdf
    • http://niwifara.22web.org/osrs_dragon_slayer_guide_runehq.pdf
    • https://cdn.sqhk.co/junikesiza/jgiidig/morobuliba.pdf
    • https://cdn-cms.f-static.net/uploads/4403557/normal_6032f2acb8f03.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rowebilit.epizy.com/sebotivudevafiji.pdf
    • http://wupotolirenenar.epizy.com/a_pec_241_foi_aprovada_ou_no.pdf
    • http://mirivukavezigo.epizy.com/problem_solving_and_decision_making_training.pdf
    • http://nitovotiroxe.epizy.com/a_w_pink_attributes_of_god.pdf
    • http://bejopirobi.epizy.com/distributed_systems_architecture_a_middleware_approach.pdf
    • http://dinopug.epizy.com/aha_guidelines_hypertension_2018.pdf
    • http://taroveruwidiba.onlinewebshop.net/herbal_medicine_definition.pdf
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_eb47a70d559c448cb91cccaa04525382.pdf?index=true
    • http://kudogato.rf.gd/correct_comma_usage_worksheet.pdf
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_7488c06635f445dcb9670e652bf51593.pdf?index=true
    • http://taxojeto.rf.gd/jebiniko.pdf
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_98b37008166c4de3b21faa3680634151.pdf?index=true
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_9ac725413a1d48f4b685b13d533299cb.pdf?index=true
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_002c6b03e0314cb2b7ceb1ce8b91a66a.pdf?index=true
    • http://jejivosijej.rf.gd/68579370149.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011aed.bin
e58cbf88c8c9a64de08f6b57e267b47150d26528a979c614315702cdb3c4fbac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 5264 bytes
font_01_sfnt_off00012cf3.bin
29e514e1063eae7aa21af96290620e059951736f580c78d986bc4d632f0703df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF3 11308 bytes

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