Malicious PDF — malware analysis report

Static analysis result for SHA-256 105d543bf158984d…

MALICIOUS

PDF

79.1 KB Created: 2021-03-10 23:24:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3de46ff659d37376c682b42cb177754c SHA-1: 7a95278c4a5edadc338ef332ef7d3804d52f1b9b SHA-256: 105d543bf158984df4472886f803dc37171e171f7170ad7e618461b57dbea631
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a large link farm. The document body, though heavily obfuscated, contains text related to 'Desventajas de alimentos transgenicos pdf', likely a lure to encourage clicks on the embedded URLs. The primary attack pattern involves redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://crophysi.ru/award?keyword=desventajas+de+alimentos+transgenicos+pdf In PDF document text
    • https://cdn.sqhk.co/kinanekoxo/2Njjhhe/download_game_world_war_arena_mod_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepiwedo/OhbjhCr/neo_evolution_definition_anthropology.pdfIn PDF document text
    • https://cdn.sqhk.co/runusamopit/agJjbhd/xuxiximosepelikiw.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/skill_with_people.pdf_bahasa_indonesia.pdfIn PDF document text
    • https://cdn.sqhk.co/wipedekis/cUgik5e/miniclip_8_ball_pool_cheats_android.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/gjahgwc/49970300922.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/haR4xig/nails_of_america_summerwood_houston_tx.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/icgjghV/gaporesatafuxatimumeset.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/c8dgifj/elf_bowling_full_game_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jawosuzexe/jfyrAhj/30_seconds_to_mars_band_logo.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/cUONo5s/doomsday_clock_comic_amazon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_0ceb067068ff4b6da5ff7f37fd6daf12.pdf?index=trueIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_2391038178494980a46d95dca1fe620c.pdf?index=trueIn PDF document text
    • http://wovibojo.onlinewebshop.net/4120968183.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/the_human_centipede_2_movie_300mb.pdfIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_84fc63a917a744178f8610604405a504.pdf?index=trueIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_be9b0309c09e499781c15615380216fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/latufenaw/incorporated_societies_reporting_requirements.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_c68e8c84efe24dba8c1802b37dfdd7fb.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_fff5b11e30374f6d8dc9943faa68410e.pdf?index=trueIn 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_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 5612 bytes
SHA-256: 333f92f06f7d0f75dc3d7907018c4c72d44814b45eefa1345c941eacd46ae70e
font_01_sfnt_off00010846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10846 11476 bytes
SHA-256: 84ff0a115fff7660bd569291dfab869d502d7c66f4d098f712f3d09b22b44c99