Malicious PDF — malware analysis report

Static analysis result for SHA-256 87275d0e2046a2f4…

MALICIOUS

PDF

73.5 KB Created: 2021-03-01 23:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1ae10bdd04e7f8a7c9c24badb56ba9c5 SHA-1: f75ae1f7495c05057615997656ded558781b1dfa SHA-256: 87275d0e2046a2f4a156cd9ab4f14cfde0a0ebeba9c70ba45220516ebc77e59d
186 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 0.9999

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
  • 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.
  • 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://lozipotod.ru/wix?keyword=hangover+teri+yaadon+ka+lyrics+song PDF link annotation
    • https://cdn.sqhk.co/zodunoxurob/aik9hbz/friv_racing_games_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/jiliroba/j3hbgiK/rome_2_total_war_politics_guide.pdfIn PDF document text
    • http://libertinemodels.com/the_8th_element_natures_universal_cancer_killeri4yzu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426413/normal_5ff238269f9bf.pdfIn PDF document text
    • https://dakubazelup.weebly.com/uploads/1/3/1/4/131454222/3097944.pdfIn PDF document text
    • https://fitadidexedas.weebly.com/uploads/1/3/5/9/135977916/681958.pdfIn PDF document text
    • http://card2card-perevod24.site/all_indoor_water_parks_in_texasei2al.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/txpjKhj/final_freeway_2r_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/hih0hdE/red_robin_coupons_printable.pdfIn PDF document text
    • https://mevemedetu.weebly.com/uploads/1/3/1/8/131871578/xunakataradu-kipirelu-mevele.pdfIn PDF document text
    • https://cdn.sqhk.co/todusukiraxi/hgDQ9gc/athletic_apparel_industry_market_share.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/hhjEjia/digital_marketing_jobs_charlotte_nc.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/ajjgx1g/51788501011.pdfIn PDF document text
    • http://the-english-temple.com/adobe_premiere_pro_2017_vs_2020x98rz.pdfIn PDF document text
    • http://kismykeitio.best/review_sheet_mask_innisfree_aloe_verarfvtb.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/jghkMfI/obsessive_list_makers_crossword_clue_clue.pdfIn PDF document text
    • http://effektzhizni.ru/jogadoxedal9erir.pdfIn PDF document text
    • http://tronreserve.online/72366073457ugzcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE333 5296 bytes
SHA-256: da0f658c98469d11a64871aacd63470c78db11ac3be5cf86c7a3b0af80595161
font_01_sfnt_off0000f555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 10380 bytes
SHA-256: 0a324d53c8dd32b98e411048d081b052f3d0069989aba9be23163c7f35bd34f5

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