Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b216722e7a8a93…

MALICIOUS

PDF

107.6 KB Created: 2021-04-15 00:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6fd43bf154badcb51b1535075c83083b SHA-1: be44e8f11d7f5c2ed6594f91a7d651dc96fc52a5 SHA-256: 08b216722e7a8a932a075fe301534bda3853a7192fe5e37d9a7a6b864821b72a
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=dewalt+dcd791+vs+dcd991 PDF link annotation
    • https://nunavupogo.weebly.com/uploads/1/3/4/4/134471291/gujowilale.pdfIn PDF document text
    • http://nabuxusamabola.iblogger.org/installation_adoucisseur_d_eau_fleck_5600_sxt.pdfIn PDF document text
    • http://easylearning.space/torububumizonatigopesikingxw4.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/7227446.pdfIn PDF document text
    • http://itverys.space/50573756559x1chd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_60538f13ca6b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483083/normal_5fddc6054d1fb.pdfIn PDF document text
    • http://selizixid.iblogger.org/82387868258.pdfIn PDF document text
    • http://goldstein.capital/zazaravodokewozovokaxugrdbjp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_2ef6bd3e327f43a0a7042cc6d21546b3.pdf?index=trueIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_997530c7891441208762819f5e3e8ceb.pdf?index=trueIn PDF document text
    • http://bafemiw.epizy.com/tripartite_model_of_attitudes.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_3fdbc52636164c14a00d80e88d8a740b.pdf?index=trueIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_d234e34dd1844f0489a4efb1b6b19e0f.pdf?index=trueIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_ea310e705bdb4b9cb5380331f44a7c34.pdf?index=trueIn PDF document text
    • https://51364a6b-283d-4537-b9df-48522fd8faf2.filesusr.com/ugd/921180_49fa63fc832248b189726e302a2fa038.pdf?index=trueIn PDF document text
    • http://jupetovujek.epizy.com/ali_baba_40_chor_story_in_urdu.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/billings_method_chart.pdfIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_61c504617e9f4f48b3d230c707d1781d.pdf?index=trueIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_2c9a6ec5cabd435a89207ffb0be814e2.pdf?index=trueIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_7af2657f57a7455b96c45b773c763cf6.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00015315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15315 6504 bytes
SHA-256: 1e08b1767a23965112eba55997321b003bff0295b0a6d5700b616f9a1c204222
font_01_sfnt_off0001634a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1634A 5276 bytes
SHA-256: a75b0a79eea1d717afaf493997bb1bc58d03eee037efd8a7cba6a801a2718c49
font_02_sfnt_off0001757d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1757D 12852 bytes
SHA-256: 118b8e8e821d374b055a847b156ccb0e35f8e2ebc786f978c02c2c0496b65a0e

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