Malicious PDF — malware analysis report

Static analysis result for SHA-256 de07952bad5afc0b…

MALICIOUS

PDF

75.4 KB Created: 2021-05-24 10:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e7e5afc6535eb1648425c8e77e788e47 SHA-1: 902e57acf891dee5dece1890df123f6c59e7e4be SHA-256: de07952bad5afc0b8a33753ff90ac14bd37ade623bd5fb704c2e2ab36fb228d1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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://xajibur.ru/strik?utm_term=how+to+maintain+a+toyota+corolla PDF link annotation
    • https://fonevufaj.weebly.com/uploads/1/3/4/4/134444269/tozimitipatusus_bulekinoni_lemalogafafo.pdfIn PDF document text
    • https://gapulujazupimes.weebly.com/uploads/1/3/4/7/134775062/6116000.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485822/normal_5ff06cfd5a5e1.pdfIn PDF document text
    • https://fularoxu.weebly.com/uploads/1/3/1/4/131452806/3600853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415526/normal_601b608828e62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5fd2812ebc88b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_600c00747f9e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_600b4fd4df81b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480155/normal_6057a049d73cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5fec7f030179c.pdfIn PDF document text
    • https://xogevowizixid.weebly.com/uploads/1/3/0/9/130969953/menidenituxota_mafakifo_norojojekalapo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4e138109-b541-4f00-862e-2ed4ec98080a/western_snow_plow_dealers_bemidji_mn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/436e7c2a-7b51-4cee-854f-e49bd7cebd7a/adobe_flash_player_for_chrome_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65b3621-1049-469e-bdf9-bfdd33048e49/intel_g43t-dm1_v_a00_motherboard_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/296d8747-88eb-4bf3-8500-0745053f4973/popanusilabutatovajifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99904ca2-7c75-4032-b28b-bf20a5cc161d/the_neverending_story_2_stream_german.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1960a9ed-f9cc-4c07-9459-e1581a87e2ae/how_to_teach_habits_of_mind.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF4 4592 bytes
SHA-256: 47f51e6270111426fecbe24a382b2351dd997b4af6b185a1d33eee7d1b9744d3
font_01_sfnt_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 10832 bytes
SHA-256: 588c164b05feb044cce45f0b45facfeb2bb6d1c1dd3a7fa9ef03dff4152a7c08
font_02_sfnt_off0001126d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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