Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f801d21dd88c858…

MALICIOUS

PDF

73.9 KB Created: 2021-03-24 07:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 367e5b6cc4c55986ac0c563386ce968a SHA-1: 803f7b475eff199e280bd8ccc2c1a61972caf92b SHA-256: 9f801d21dd88c858c4711a2317636cbe0513259867a4807ec1ca829b104ec63b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI usage and classification as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest maliciousness. The embedded URLs point to suspicious domains, and the document body, though heavily obfuscated, suggests a lure related to online conversion tools.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://druttle.ru/123?utm_term=converter+video+mp4+para+android+online PDF link annotation
    • http://vkrowl.com/times_table_worksheet_grade_2slz20.pdfIn PDF document text
    • http://baranaydin.org/year_of_the_dragon_philip_sparke1hl7e.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/i_want_to_learn_arabic_language_through_english.pdfIn PDF document text
    • http://help-nanny.site/95163101376h7drv.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/pact_of_the_raven_queen_warlock_5e.pdfIn PDF document text
    • http://damvglaz1.xyz/mary_j_blige_ziprn5dd.pdfIn PDF document text
    • http://instapresent.site/how_much_staples_charge_for_shredding29bcs.pdfIn PDF document text
    • http://about-igsupport.com/gakujik28nqr.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/fo4_sim_settlements_guideqb65v.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/firutap.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/51aa3c09-b055-4cb2-bedb-d3d5f9e5e6c2/9832543296.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_fcaab430acb44c1898661c6d17a764c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b197e10-2432-4ad3-b2d0-e30d2e853e96/kasuzapuxebugom.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_c39cf2eab7664825adc44e8ce91fea75.pdf?index=trueIn PDF document text
    • https://8e6fe9cb-6e01-49b8-a8bf-add1d7538daa.filesusr.com/ugd/4e948c_9f1ad188dc504fdeac3dde298c993d88.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3050b393-5072-460c-8e2c-c5d32052071c/25620276595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89777ebf-b7db-44de-ad81-a04c3c234473/5e_elemental_weapon_monk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1edd30-d91c-4bad-b0a7-f23c2beded48/vutejotamufifawesinumu.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_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 4980 bytes
SHA-256: a64cb74e5218cb1db76eaf932153af7f55f742d733e6ac0af2eefada9ecd2ae9
font_01_sfnt_off0000f662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF662 10608 bytes
SHA-256: cf62cf7034c64a40ccdaead9b2c57680844d5bc513b3cc6d438165a5ab31be14

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