Malicious PDF — malware analysis report

Static analysis result for SHA-256 78500ee5abe0dd61…

MALICIOUS

PDF

71.4 KB Created: 2021-03-23 21:35:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ee8e48c5c95f9c6977d72147b8c5ab64 SHA-1: 205eccd1753b7691ae16ca679c383558f77f8a6d SHA-256: 78500ee5abe0dd61767e0b80a8da3dac775a185b616f5534fff74f8c0ae8e7de
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=imperative+form+exercises+in+english PDF link annotation
    • http://keborejozupe.22web.org/5773706882.pdfIn PDF document text
    • http://trylait.pro/zagg_rugged_book_pro_wont_turn_on6jixn.pdfIn PDF document text
    • http://goldstein.berlin/singer_4423_heavy_duty_sewing_machinen28j6.pdfIn PDF document text
    • http://plusstore.pro/91097312537qy4gn.pdfIn PDF document text
    • https://nirefuriwubava.weebly.com/uploads/1/3/1/6/131637308/235068.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/5918857.pdfIn PDF document text
    • http://getliterate.online/258719396960awc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484169/normal_5feb8d4bb60e5.pdfIn PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/6682567.pdfIn PDF document text
    • http://sorekivobu.22web.org/sets_union_intersection_complement_worksheets.pdfIn PDF document text
    • http://prolac.ru/game_campus_student_life_simulation2fdnf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444646/normal_6030f5f7106e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/67851517428.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/14043974705.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/hp_laserjet_p2015_instructions.pdfIn PDF document text
    • http://mezigozogug.rf.gd/guided_ice_fishing_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/kalender_2020_sverige.pdfIn PDF document text
    • http://vipaviveza.epizy.com/happy_halloween_coloring_sheets_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e176650-e406-4f7c-8cb9-820975220bc2/nikon_d5300_vs_d3500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d0d048-6f85-4e1c-bc8e-26be6c361b25/vulinexotepifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a637b6ed-0bda-41a9-b50b-270849e86bd7/ford_mustang_shelby_gt500_price_2020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65C 5496 bytes
SHA-256: 486cd01ee86e61838746553ddd014a1bc547fe7f809bfc7bc823d4462cc82908
font_01_sfnt_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 11076 bytes
SHA-256: 5030d509b997c4d362627b2877a56f6b88b69661935499de82c414fb863f8fc1

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