Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d577935d3898be8…

MALICIOUS

PDF

85.6 KB Created: 2021-03-15 17:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a3f28942ed1ac8c320d67cc8a08fca SHA-1: bcb1cc490d15a847af6444cd98357b7e162cc1e0 SHA-256: 2d577935d3898be8d43a5ef9e379804ad5c1d01f2b0472bb1533bade5f7be41b
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs indicates tracking or redirection, further supporting a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/123?utm_term=arma+3++pc+game
    • http://barcaporirternet-interbank-pe.com/lidufakodatogkxlj.pdf
    • http://nafepuzemobir.sportsontheweb.net/why_wont_my_hedge_trimmer_start.pdf
    • http://reduslim-officialsite.site/23930132639qtlyi.pdf
    • http://zebiripu.mygamesonline.org/burhan_bungin_sosiologi_komunikasi.pdf
    • https://cdn-cms.f-static.net/uploads/4475580/normal_603d388abc297.pdf
    • http://dakisemakegag.sportsontheweb.net/kenmore_gas_oven_repair_manual.pdf
    • https://static.s123-cdn-static.com/uploads/4453528/normal_5fc6495189d77.pdf
    • http://warixedivukinat.mygamesonline.org/94489153364.pdf
    • http://vexasefagi.scienceontheweb.net/what_does_blinking_red_light_mean_on_lg_tv.pdf
    • https://static.s123-cdn-static.com/uploads/4501233/normal_5fcfb7e86f6bf.pdf
    • http://7lessons.website/how_much_does_boeing_engineers_makeysca9.pdf
    • https://cdn-cms.f-static.net/uploads/4379230/normal_604172b7ca49b.pdf
    • https://cdn-cms.f-static.net/uploads/4475194/normal_6040618d246af.pdf
    • http://cardioactiveitalia.site/ryobi_10_compound_miter_saw_with_laser_line_ts1345lp917p.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/eb1d5dea-86ac-4d09-8f60-2df5b35b2248/ativa_shredder_manual_a16mc17.pdf
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_095d30d5aa21448599ed34cc8f257cad.pdf?index=true
    • http://sidepojedava.myartsonline.com/bcece_le_book.pdf
    • http://sulijugofogim.onlinewebshop.net/mapanojipaxuwosurelax.pdf
    • https://uploads.strikinglycdn.com/files/25402533-039c-47ad-829b-911d9fe3c0c9/40076123647.pdf
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_1caf42c1f4714e59a56e193729903b90.pdf?index=true
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_e24ec092126f470b89488d45b027e17f.pdf?index=true
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_075b80dfec1f451286fc06d4e960f4c4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/878ee343-45e2-4992-800e-49bebac580e1/mujupasaxupupida.pdf
    • https://uploads.strikinglycdn.com/files/03b96f22-6216-4898-a468-aff51caadd01/gitutefokutigawireseruwu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001054a.bin
f380b967710246e874ad3cf6638264201eeeb480a298946f0f659ab1e568dfa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054A 4640 bytes
font_01_sfnt_off000114f8.bin
c834c6bc8aed55f9bcb7be30ab2ca6301e43d42af388f18ccedb9a46a39167ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114F8 11100 bytes
font_02_sfnt_off00013afc.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFC 4324 bytes

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