Malicious PDF — malware analysis report

Static analysis result for SHA-256 897b0c9cce037c3c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-24 00:21:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 79802ba87ce6919cc68337a1ea0c9928 SHA-1: 66ff7e7df3363bd56e51019362bb360b0ff51a11 SHA-256: 897b0c9cce037c3cd7968895077f9d66af2a5ae5a013ea4c53036f4b4462bf4b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest the document is part of a link farm designed to redirect users to potentially harmful websites. The document body, though heavily corrupted, contains keywords related to 'Amazon Kindle ebook convert to PDF', indicating a lure to disguise the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/award?keyword=amazon+kindle+ebook+convert+to+pdf PDF link annotation
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/473c575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488837/normal_5ff57fe25bc9f.pdfIn PDF document text
    • http://activa-fb.com/27747354259sr4mf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_6029380dbdf08.pdfIn PDF document text
    • http://kujedepis.22web.org/sales_commission_agreement_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420028/normal_5ffff7efb8439.pdfIn PDF document text
    • http://goldotzyv.ru/tuvifavipikotcut9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_60072af0333ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413566/normal_5fe8e6e06f442.pdfIn PDF document text
    • https://wuwikofoxanep.weebly.com/uploads/1/3/1/4/131437976/wusulupiv.pdfIn PDF document text
    • http://goproonly.com/pekoxenl1yt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476596/normal_6018d7a441a69.pdfIn PDF document text
    • http://pornbustyvids.com/que_es_el_nazismo_aleman_resumenpuj1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_60134f3d4f185.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb96910b-d174-4903-9d65-4732e0104b71/coleman_roadtrip_lxe_vs_lxx.pdfIn PDF document text
    • http://sibivamu.epizy.com/neninata.pdfIn PDF document text
    • http://bikuxawas.epizy.com/are_timex_watches_made_in_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1724c48b-09fc-42d7-9b76-699a2f7cb762/how_to_set_clock_on_pioneer_deh-1100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853a44ca-8f7e-4711-b82a-814fb27c4bed/paige_spiranac_golf_tips.pdfIn PDF document text
    • http://ripogulakurido.epizy.com/sum_of_geometric_sequence_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a2e8b1c-9492-4d4e-a232-b7cbf7c0ec84/jikovolodaruzomuz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CB 5428 bytes
SHA-256: 939ff48936dbc5cd995d7d23e141cac70e0a25a2a0e3e8688f474f791b5ff18a
font_01_sfnt_off00010437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 10792 bytes
SHA-256: 4dd62cb8172fed3e2a113c22252fde899f9ad62a2ff8c98206e025a382187b5c

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