Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d4161866b17e3b…

MALICIOUS

PDF

81.4 KB Created: 2021-02-26 03:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 09f61e4f16f3c939e836376863d16391 SHA-1: 744ffce4ad2c584a5d931670424a72399866be9e SHA-256: 93d4161866b17e3b37073be14bdec936a1cf783ca4ad574c3bf83b8a5228d5d9
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, designed to direct users to various websites. The heuristic 'PDF_SEO_LINK_FARM' indicates a link farm, and the presence of external URIs suggests an attempt to drive traffic. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=what+kind+of+jobs+can+interior+designers+get PDF link annotation
    • https://cdn.sqhk.co/zejejofe/hfjhhdU/plants_vs_zombies_mini_games_level.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_601e2ddfb1c67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453563/normal_60093f6dcb081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_602eb840bc91d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444646/normal_5fc9dafcac2ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_602f8591a7c1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445331/normal_60093d049a3d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_6016ec1f6b3a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_602763a7a3379.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/how_to_score_wiat_iii_essay.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/hiKji6x/dragon_robot_2_hack_apk.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/dalizejolojoda_tikaju.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/what_is_root_cause_analysis_example.pdfIn PDF document text
    • https://wemogejivaje.weebly.com/uploads/1/3/1/0/131070934/4388187.pdfIn PDF document text
    • https://jupolojujilozas.weebly.com/uploads/1/3/4/5/134598947/3982812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_60221799b2338.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/fuxuxi-denadul-pofobojuvubama-zisonovux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_60150dcbbafcb.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
    • http://jisijuvod.myartsonline.com/27821652358.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/how_to_put_a_thermostatic_valve_on_a_radiator.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/what_age_group_is_the_three_little_pigs_for.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_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 5332 bytes
SHA-256: 6d9d6ac63e792c77d803eafd932ceaacc63ad961ed80996cd8169431b4910692
font_01_sfnt_off00010602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10602 10540 bytes
SHA-256: 585b8d20dc8398f0f0e54b6fb7ee3fa074e01ca5c2cb87b216d73eb87cbb8966
font_02_sfnt_off00012a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2