Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e06922e3af6ea9…

MALICIOUS

PDF

79.5 KB Created: 2021-05-14 19:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1637bd67a4bf8d9fa826784938c4a1c2 SHA-1: 6961d7b56da98eef673cdf7acec4e09276b36b00 SHA-256: 43e06922e3af6ea91d3f88442fe1900bfc5fdc6102c54f09009153e03fa5fa77
136 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it's a lure for free downloads, redirecting to the URL https://pelibifir.ru/strik?utm_term=roadmaster+granite+peak+24+purple. This URL is flagged as suspicious and is the primary indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pelibifir.ru/strik?utm_term=roadmaster+granite+peak+24+purple PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479222/normal_5fdcb4620ecd8.pdfIn PDF document text
    • http://fomimobevab.22web.org/dictionnaire_mdical_anglais_franais.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405202/normal_5fd811770cdcb.pdfIn PDF document text
    • http://vuzeliligovitu.iblogger.org/assembly_language_and_computer_organization.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474722/normal_5ff80332e4508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497095/normal_60260768ed8e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459176/normal_6058ec14b7c05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5ffd0f9220887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483851/normal_5fc5add1b5322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fcacac866d8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407064/normal_605c5c1c10175.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381730/normal_5feb5c598084d.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://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_803d25388e304cf29211093c0177ed06.pdf?index=trueIn PDF document text
    • http://gaxijejazaxedaj.epizy.com/kooples_size_guide_womens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2e2bac-6f5e-4d9f-88ea-92cce60a9799/hamilton_beach_coffee_maker_not_pumping_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47e42cd-6b1a-409c-af7a-dc3da37e9fdd/indian_raw_food_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43df1b24-81c6-4413-923a-b642861d1a8e/69869286570.pdfIn PDF document text
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_5cb2c5605c1e4d2c8a372cf001291500.pdf?index=trueIn PDF document text
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_f71bfc6f4f8b46a8ae0f884edfa494fb.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_daab331bfde94c60ae7560b9471a0bfc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/459bf9f3-264a-4d44-8392-f307db2045f6/sazufovasun.pdfIn PDF document text
    • http://bolozenafo.rf.gd/did_joseph_campbell_invent_star_wars.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_off0000e819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE819 5452 bytes
SHA-256: f80dedf35554c2da6f4fd4233f3b17499edc4043432c4f48903d7a853253e00f
font_01_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 11508 bytes
SHA-256: caf9630e6044047f72682d30f31ee6db7ea4e45084d2a34c0ce499db4b03f3c4
font_02_sfnt_off000120e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333