Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef2c1abf84a1a8e…

MALICIOUS

PDF

71.8 KB Created: 2021-03-01 10:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8200124cd16c886bae3fa1226abd5e3c SHA-1: 3c70c8862ed35c1b9ec1ccbf26ff778a7853eea2 SHA-256: aef2c1abf84a1a8ee86293a1799e0e2136eb05c0170d292452b41b545c6ddc36
126 Risk Score

Malware Insights

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

The PDF file contains numerous links disguised as a service manual, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wb?keyword=dell%20u2711%20service%20manual PDF link annotation
    • http://zitekimuzefovar.iblogger.org/guided_reading_level_h_grade_level.pdfIn PDF document text
    • http://nutapobo.iblogger.org/63810460065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_603c4063b87d5.pdfIn PDF document text
    • https://rolobidixogiru.weebly.com/uploads/1/3/1/6/131637372/leradawugo_zusad_misafin_rejakipujize.pdfIn PDF document text
    • http://powujezegen.22web.org/felijikemukolofeniludojaw.pdfIn PDF document text
    • https://vukajikabazaxeg.weebly.com/uploads/1/3/4/7/134711597/rugal_mesox_lefarodudumusa_zagimodoru.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/fhjgihU/my_talking_kitty_cat_series.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462075/normal_5fd296f643a00.pdfIn PDF document text
    • https://pagafika.weebly.com/uploads/1/3/5/3/135339488/3519384.pdfIn PDF document text
    • https://cdn.sqhk.co/fenogate/gRfgjs7/givepagok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_600b37fbeac4e.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/cV59Z2S/granny_chapter_2_minecraft_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/OgdbTjc/bezuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5fe64801359f2.pdfIn PDF document text
    • https://jotigigej.weebly.com/uploads/1/3/0/7/130739509/fisenedu-sivowofebo-fezalubumuraxux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xulezudo.epizy.com/crystal_report_13._0._20_free.pdfIn PDF document text
    • http://vupafigimewex.rf.gd/kodetegukudofip.pdfIn PDF document text
    • http://lonelogu.epizy.com/zixediluwajelajakagonoz.pdfIn PDF document text
    • http://wudokuzogikozu.rf.gd/69317776016.pdfIn PDF document text
    • http://tuxojemuje.rf.gd/18296083584.pdfIn PDF document text
    • http://nudujefor.epizy.com/electrical_engineering_technical_report_example.pdfIn PDF document text
    • http://tezofer.rf.gd/gimadizowasewosekoxute.pdfIn PDF document text
    • http://xirokigekokumar.rf.gd/76481524861.pdfIn PDF document text
    • http://fikexole.rf.gd/18668494573.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 5268 bytes
SHA-256: 9fefeb892ffe3b9a31cdc609adc52bef7ae0a554119ce1be21027e822ab47067
font_01_sfnt_off0000eae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 11468 bytes
SHA-256: 4d6be4a297a1caaf8160a024bef72a403add46fe0fe4913afcf78d2240ca7c2d

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