Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc51245638a40fa4…

MALICIOUS

PDF

77.5 KB Created: 2021-03-15 05:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bddfa2b43134e1a1b6f05df4bf60b6e6 SHA-1: 22c43beade83c5a6d99476d5dace9cd3447f39b5 SHA-256: bc51245638a40fa49250e41453f8b9b3578dcd12cc2730456b0a7aeb1b8ac215
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic firings and numerous embedded URLs suggest a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains metadata related to PDF generation, and the presence of external URIs points to an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/wix?keyword=steel+dragon+melee+guide+osrs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375342/normal_60422351e960f.pdfIn PDF document text
    • http://piredvizhnik.com/harry_potter_second_book_downloadg3tcb.pdfIn PDF document text
    • http://classkaod.ru/puxogaraz3nkno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_601b6df04cfe7.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/G9idTkf/bmx_bike_racing_games_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxogubajo/M4cje2t/kupemaduwozisimixeze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454281/normal_5fde0d75291aa.pdfIn PDF document text
    • http://winoorama.site/chiari_malformation_vs_dandy_walkera2anq.pdfIn PDF document text
    • http://genoray.pro/7755231318j54a0.pdfIn PDF document text
    • http://italiabeach.space/how_do_i_reset_my_lux_thermostatvpoiz.pdfIn PDF document text
    • http://xanejog.medianewsonline.com/87746719256.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/9dR7Mrj/fluval_flex_57_flow_rate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_6037c3116b982.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/gfAfhal/84658781488.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/cfe2b81f-23ff-4077-8b8d-541300015d20/flat_stanley_book_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a19180-f746-46e4-a841-8146350afee8/how_to_study_for_clep_english_composition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a515aa-523b-489e-9c4b-5b49aabe2719/how_to_play_midi_keyboard_without_computer.pdfIn PDF document text
    • http://nifusotajezunur.atwebpages.com/newurilipo.pdfIn PDF document text
    • http://dilutibu.onlinewebshop.net/kusovixijelurawatigaves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae849a0-f547-42ff-8213-26a24645a5c9/dell_precision_m6800_plugged_in_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea22a995-5f02-4db3-921d-639cff77206c/best_rated_vent_free_gas_logs.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 5248 bytes
SHA-256: 0cef9adea32269097eea2d1da94607da0af40145d36406b53f928df46afd3c3d
font_01_sfnt_off00010387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10387 10820 bytes
SHA-256: 2cb48969e5cb5f6dfc6d2355a07d249ec91dbe32158aeb8b3adaa78890dc46c2

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