Malicious PDF — malware analysis report

Static analysis result for SHA-256 5215541d17fe922f…

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 02:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 826c24b3c4b96d089d21453071e5d70f SHA-1: 00669f1f865d93efcb16df16fd8127a774685af8 SHA-256: 5215541d17fe922f12a653d234b4b18b96e0f86c8c90ef44c93c544fb72dcc6a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and flagged as part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://jacksth.ru/wix?keyword=virtue+oled+board+manual PDF link annotation
    • http://dalnoboyi.xyz/mivupuverularurvdmr9.pdfIn PDF document text
    • http://zasaluto.iblogger.org/ethoxylation_process.pdfIn PDF document text
    • http://banki-internetowe.com/limaxejeropojotupoto41am3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413978/normal_60414924ea3e0.pdfIn PDF document text
    • http://leopolds.space/boxerufuletzxdb.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/722818203338hmbg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_602876f4ee436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492918/normal_6035d8ff27f80.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/is_sao_completeddrwuf.pdfIn PDF document text
    • http://ijmalan.xyz/professional_shop_manuals_-_troy-biltxqzce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370052/normal_5fcef8fc85d94.pdfIn PDF document text
    • http://neip-forum.fun/borobejajowmk63g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480748/normal_601c7c3a85a73.pdfIn PDF document text
    • http://daliadiago.com/5506481206v5i3u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_605380597afd7.pdfIn PDF document text
    • http://loveworld.club/tirobz3bsf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_605796e3be5de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369505/normal_5ff78dcbd22ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_6015914bc9ac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_60518ee969fd3.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://vorojere.rf.gd/dresden_files_battle_ground.pdfIn PDF document text
    • http://zowetilazu.rf.gd/brand_equity_concept.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/how_to_use_z_statistic_table.pdfIn PDF document text
    • http://gukerarewaf.epizy.com/xugubowu.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_off0000dd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD32 4780 bytes
SHA-256: f6f26662262a300bf833acab92641814098450a323353485c1c62ede0f691df4
font_01_sfnt_off0000ed4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4F 10928 bytes
SHA-256: 5aeba1c8b8735e3afae57b4237bec56be4c89b799235fd5b3827e74218b8fede
font_02_sfnt_off0001125c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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