Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a814ed8a8466aa…

MALICIOUS

PDF

87.6 KB Created: 2021-05-07 00:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f4751a201618bde94f19d9a9f228f9f4 SHA-1: 291f19849d8caffd71f54645209c3dd56b6f041d SHA-256: 37a814ed8a8466aaed876b73871d1ed5d9cb4971553a237baac07f3953bf99d2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of external URIs and the overall structure point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=carbon+democracy+review PDF link annotation
    • http://select-get.top/be_thou_my_vision_chords_cbn3fn.pdfIn PDF document text
    • http://samelike.site/sobilas3z7kl.pdfIn PDF document text
    • https://cdn.sqhk.co/saxamabewido/jfUNhgX/tuwumejezeberibedodujita.pdfIn PDF document text
    • http://blablablacar.online/how_to_repair_afterglow_controllerulg05.pdfIn PDF document text
    • http://closemaze.com/chippy_the_squirrel1zejl.pdfIn PDF document text
    • http://tojagetuwiger.iblogger.org/will_taxes_go_up_in_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/pilimisoduk/jhjc8sy/los_angeles_craigslist_free_stuff_for_sale.pdfIn PDF document text
    • http://copyrightreports.com/ruger_p95_9mm_breakdowncbnro.pdfIn PDF document text
    • http://botefedej.sportsontheweb.net/cat_syllabus_2020_for_mba.pdfIn PDF document text
    • https://cdn.sqhk.co/goxufime/iib5GmK/sotifodemut.pdfIn PDF document text
    • http://instapresent.site/44634471021i33vh.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/jdEidhi/mcdonalds_food_safety_test_answers.pdfIn PDF document text
    • http://vpntop.info/sedelulopalodimivijan7tg.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/hguleHQ/smash_badminton_court_in_electronic_city.pdfIn PDF document text
    • http://copalofa.site/nawisigodagevogodoo785g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavezusi.onlinewebshop.net/dawuvafogejazi.pdfIn PDF document text
    • http://wodixosikomo.rf.gd/96185366971.pdfIn PDF document text
    • http://naxisimi.epizy.com/97926805449.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/belling_format_oven_door_handle.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/bengali_film_villain_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/benzoic_acid_chemical_information.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/87460296961.pdfIn PDF document text
    • http://vemesivudaro.epizy.com/maroxijupavoragovoj.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_off00011bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBC 5176 bytes
SHA-256: 8de70321d898f890639eef855279a4d0f92d2b35de0f2e3cb6af6a2afdc26923
font_01_sfnt_off00012d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D54 10408 bytes
SHA-256: d7369df1da676fb765fe2b2cfbf6ef03ae72b221a28d5892024e62c1fa2978b4

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