Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d4b0920794e1e1…

MALICIOUS

PDF

78.1 KB Created: 2021-04-05 13:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4da48c681e006a2425f8b31d59a7bcf7 SHA-1: 7ad8ceaa8c9a595d84d7c5ff1d8a7db4b25c7446 SHA-256: 35d4b0920794e1e12d5c72f15fc1bde4538fcf4433219a7f46533c24699357b5
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 0.9997

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://jumiwimov.ru/award?keyword=sindrome+de+abdomen+agudo+ginecologico+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450038/normal_603f136b94c9d.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/sunbeam_heated_blanket_10_heat_settings_quilted_fleece_mushroom_queen.pdfIn PDF document text
    • http://lokotahas.ru/gluten_free_vegan_party_food_recipesfagr5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491936/normal_60541e871922a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_600aef2c5b3f5.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/62902515979dl009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474457/normal_5ffd65bc6a6de.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/dugibawefuzeronara.pdfIn PDF document text
    • http://nubatevujonuw.mygamesonline.org/38679220301.pdfIn PDF document text
    • http://hightrade.club/example_of_past_continuous_tense_actxi9r9.pdfIn PDF document text
    • http://reduslim-officialsite.site/7729468621314iu3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_604b714b2446b.pdfIn PDF document text
    • http://complect-tech.ru/logic_puzzles_puzzle_baron_answerss2jje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofojomumam.epizy.com/como_calcular_volumen_de_prismas.pdfIn PDF document text
    • http://moxapowi.myartsonline.com/30695561967.pdfIn PDF document text
    • http://mizugegixa.epizy.com/baker_s_german_chocolate_sheet_cake_recipe.pdfIn PDF document text
    • http://kadusuru.rf.gd/dokumen_amdal_pelabuhan.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/tozizuk.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/hollow_knight_queen_s_garden_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/44098149944.pdfIn PDF document text
    • http://kuxoxokazutuv.myartsonline.com/quran_arabic_english_transliteration.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_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 5540 bytes
SHA-256: 8caeb146997b0c2690547c5cf313dd57b5a11ab983855cb3392c97d8fb427f79
font_01_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 12604 bytes
SHA-256: d7b73b57439812b77f5d65f28441e7deec9238998bd79663c2be1f160116933f

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