Malicious PDF — malware analysis report

Static analysis result for SHA-256 854710588d0e4ce3…

MALICIOUS

PDF

88.7 KB Created: 2021-04-03 23:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ac82a67c077c9e02374c29e810dbea5c SHA-1: 5be43ba2e734fa6d266c8646fdd214b6d72e722f SHA-256: 854710588d0e4ce303fdd4c0fde9958090b0573f58c550a0c9a9749b57978d74
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/123?utm_term=argumentative+essay+about+technology+pdf PDF link annotation
    • https://cdn.sqhk.co/bomumuxa/f2Ngjun/gumball_games_bro_squad.pdfIn PDF document text
    • http://buylettersonline.com/wunder_von_bern_musical_liederbdftd.pdfIn PDF document text
    • http://mainsale.info/fisher_price_cradle_n_swing_instruction_manualpgulr.pdfIn PDF document text
    • http://techanomic.com/91195039978u27qr.pdfIn PDF document text
    • http://larts.digital/2015_fillable_1099_misc_form_2016lezk6.pdfIn PDF document text
    • http://ultra0.space/78013232283an6rl.pdfIn PDF document text
    • http://weraka.online/foraputonimsgqye.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/djhifEv/pevitonapulexemijisin.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/M8Od7gg/34666616455.pdfIn PDF document text
    • http://parkingtest.xyz/6388983741uvtt1.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/jcjh7HS/59571094959.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/car_loan_calculator_google_sheetswzqtl.pdfIn PDF document text
    • http://reduslim-sito.site/sunday_school_lessons_for_8-10_yearz3rf4.pdfIn PDF document text
    • http://creamwalls.space/wheel_size_sigma_bike_computerm27nw.pdfIn PDF document text
    • http://vbnmcxz.xyz/washington_state_unemployment_phone_number_to_file_weekly_claim5upki.pdfIn PDF document text
    • http://intereriia.com/fuwijudebujaviwo6voyl.pdfIn PDF document text
    • https://cdn.sqhk.co/wufaluvete/yjjwvUs/bazef.pdfIn PDF document text
    • http://tryadasert.online/budget_planner_excelz13l0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosijatigatu.epizy.com/free_cloze_worksheet_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf4babd-844c-4244-a820-2a21d80285f3/is_na2co3_a_strong_electrolyte.pdfIn PDF document text
    • http://jupukatovukupi.rf.gd/winaxudodawufesofonupiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdd47e8-f4e3-47bb-9298-ba6ce5b86b76/61402590420.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_off000119fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FC 5860 bytes
SHA-256: 3fac0f9e3b02aaa9a5d571f60f3b4d432db701edf53c7bc0e5a601c17e58bba6
font_01_sfnt_off00012dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD1 12040 bytes
SHA-256: b54f3f20c0778ad3e56033d9ea3b95c051860054cd7bde642eb66da98127348c

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