Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abbf5865d1d9a2e…

MALICIOUS

PDF

89.3 KB Created: 2021-03-24 20:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e6824ac512036fc77336d4162e9dfd0a SHA-1: 20498ec4db87572bf8f39b0ceac7b3d8a6f724e7 SHA-256: 6abbf5865d1d9a2ef5ee509c26f5e688c38b7b1bf9fdce7a0023404d650159c2
136 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. A heuristic identified an image lure linking to an SEO redirector with the URL https://gimoguvi.ru/award?keyword=clinical+pharmacy+and+therapeutics+walker+pdf, suggesting a phishing or malware distribution scheme disguised as a free download. No scripts were extracted, but the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/award?keyword=clinical+pharmacy+and+therapeutics+walker+pdf PDF link annotation
    • https://cdn.sqhk.co/mevazasid/goic5jf/32349378403.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/4ijdgcc/warhammer_40k_8th_edition_eldar_codex.pdfIn PDF document text
    • https://cdn.sqhk.co/loxakejela/ejjVYic/forever_new_size_18_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_605577f1338c7.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/LTgjDib/pelugaxuribarawoxiteme.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/bn4ghgP/beaumont_texas_civic_center_events.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fddbd79a2143.pdfIn PDF document text
    • https://cdn.sqhk.co/woravejafeto/iEhieb1/daily_equipment_inspection_checklist_template_word.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/ejfjheG/josavovigonuvinesev.pdfIn PDF document text
    • http://maxufadewodov.22web.org/manualidades_con_palitos_de_madera_para_nios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_60490564627b3.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/giN52je/vagolajolaridojezifinas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://uploads.strikinglycdn.com/files/6710b644-7aa3-47b8-9d56-227577c23d2f/how_much_money_does_a_cfa_make.pdfIn PDF document text
    • http://mujodefifotufe.epizy.com/is_isn_t_are_aren_t_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b05de84-7d8e-46dd-8410-2d235f6c6760/genoxojobofanojol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c526c859-ada0-411e-926f-318e0f85d760/wilurufugejazidenup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b18baf1a-081b-464c-a767-5dc5013cc120/what_qualifies_as_two_forms_of_id.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/filomopugesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d76470d-b872-4d03-88ca-a510c40ac91f/zopelavivuwogogasij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e29ef02-af91-4bbd-adba-0348624ddc47/1104357652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63822bd5-8155-4e47-a003-cdd952620448/26211451863.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012de8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12DE8 18948 bytes
SHA-256: 56f3af4a398983d2c461ac546673965c81e5788702dedcfcf6473b37191359b8
font_00_sfnt_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 5560 bytes
SHA-256: 83aad111edaf28d88004d8e977c6a85461b4ce4b89b48d39bf917ef1c1d395d2
font_01_sfnt_off0000ff6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6F 2232 bytes
SHA-256: 9ce32b84a4603fb45ca7c053fa18acef28450535879fdea2f984567c88a3d0de
font_02_sfnt_off0001092e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092E 10736 bytes
SHA-256: cb48f2648a7ec9c570501881637a28d4e1b9ee3a4d11b2b509bc00c781bde94c
font_04_sfnt_off00014c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C44 2472 bytes
SHA-256: a923a941058c7f9aa27d89426d0cef895b96c7245da1aa29f694c215bb33c2c6

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