Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f47b928880510df…

MALICIOUS

PDF

84.6 KB Created: 2021-09-13 22:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d4aa8d75a4a3713ca235b23568011d5c SHA-1: 881b55fdfaab2dba7f8b4c45a734f6930d7a983a SHA-256: 4f47b928880510dfbced067ccd6dd65c584fd00b315d064a73108424d898a236
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. The presence of numerous external URIs and the 'Password-protected archive handoff' heuristic indicate a phishing or malware delivery attempt. The document likely serves as a lure to download a password-protected payload, which is a common tactic to evade gateway security scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://bakefruit.com/uploads/files/202109091415294065.pdf In PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/21e840ed32171c40aa940bc9f81ee88b/83996562267.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/80343790583.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/91826295928.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/5638846556.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/darusexuf.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/39990584584.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/19623280460.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/4e34a97bde59553d92edec286b6f42f2/22640581263.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/6017983386137e091ae8f2.pdfIn PDF document text
    • http://jowinbio.com/upload/files/202109061452136937.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/gonelipoligipogakejo.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/famufugisapef.pdfIn PDF document text
    • http://labonscafe.com/userfiles/tusawizotogiduvu.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/44702241138.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/luwiwezowopezu.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/jupeb.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/61003300364.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/watukenejosulilufajov.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/194767197161371656ecb5f.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/57731041712.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/dijaluwanu.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/madefawamuvixedanokuji.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/pajexuzutore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+do+you+change+your+password+on+your+phonePDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 17728 bytes
SHA-256: 6fbbc48eaf907379001977159d228b96678235160b62116a8ee328b4cdc2ac29
font_01_sfnt_off000113aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AA 10848 bytes
SHA-256: 2405a5a365f646198cd760fa808f17b87445b90c6293705237f59c8bb66460be
font_02_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1