Malicious PDF — malware analysis report

Static analysis result for SHA-256 5242bd3536d0e9ca…

MALICIOUS

PDF

65.1 KB Created: 2020-12-24 21:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8bdc53390bf8ac8cafd4d4a3cc261401 SHA-1: 617711bf32c5f872811bb96f6861c844a2b1ff45 SHA-256: 5242bd3536d0e9ca76e48ac592c5e13174dd93776274c470f27c85bda4a16d7e
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 and a machine learning classifier, specifically flagging it as a redirector and a link farm. It contains numerous embedded URLs pointing to potentially malicious or disposable hosting sites, designed to redirect users to further malicious content. The document body, though partially corrupted, suggests a lure related to 'Top 10 bengali movie sites' to entice clicks on these links.

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://cctraff.ru/aws?utm_term=top+10+bengali+movie++sites In PDF document text
    • https://cdn.sqhk.co/bufutoje/hbhdZgr/ben_ten_wallpaper_hd_download.pdfIn PDF document text
    • https://zomurudol.weebly.com/uploads/1/3/4/4/134492975/wazapakaneg.pdfIn PDF document text
    • https://pivazadigemeza.weebly.com/uploads/1/3/4/6/134642233/tijatigovozel.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/rusufanolevi-lafanikexomog.pdfIn PDF document text
    • https://cdn.sqhk.co/lepemafe/NXgciaa/pureruduzevonoradufojix.pdfIn PDF document text
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/metutor-dafof-feladekojaka.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/jjhdheE/togizenitixaxutoxaxas.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/jd4lDia/wedexuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/wepaxuwelusu/jhhifhh/fisepopurufidat.pdfIn PDF document text
    • https://cdn.sqhk.co/zifalulog/gfnhgkG/gapuxumalovegaz.pdfIn PDF document text
    • https://dadoxagowona.weebly.com/uploads/1/3/4/6/134677816/vinasavegok.pdfIn PDF document text
    • https://cdn.sqhk.co/ludafojebi/1jiltib/79543367212.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://s3.amazonaws.com/nigimul/automotive_lighting_market_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cefaad17-e66a-466f-b5a4-a5fad3b41487/animal_testing_persuasive_speech_outline.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/xesolonuzajodekid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934c7d4c-6f48-4dfc-a108-a431ab336457/minecraft_jeb__name_tag.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_off0000b737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB737 5176 bytes
SHA-256: 7b78ecad2d7ecc0f0f3a4eecf7f1958c32747edd80a0974602f84aea8b2d948a
font_01_sfnt_off0000c8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C3 9444 bytes
SHA-256: aa1ad73eb4f0272d3d5538a090a03dadbfc64c42e1f99f61ae0de686898033d8
font_02_sfnt_off0000e92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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