Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d32ecb64dcfef6…

MALICIOUS

PDF

78.0 KB Created: 2021-10-05 06:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bb7910417d8210ade58efa0492a1553c SHA-1: 5fdd8aa52e8e32555473f0a5f7bd902869638180 SHA-256: 37d32ecb64dcfef6724b7025acd0a4fba444adfbe601e7536de3dd1a7dbf7af6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, a common tactic for phishing or distributing further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://lobanowscy.pl/userfiles/file/butijexudo.pdf In PDF document text
    • http://galaxyjewel.cn/uploadfile/files/1400388203.pdfIn PDF document text
    • https://yasacompany.com/upload/files/50585564731.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/36266644284.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a24ad25be9---86662300060.pdfIn PDF document text
    • http://eros-arena.name/eros/userfiles/file/darobetabumugamovemifupop.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/fesazoxigamimefozez.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/fuvoxibikenipukerizus.pdfIn PDF document text
    • http://gestioniarmatoriali.it/54822482777.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/mesawodijinu.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/verigojuvigaxumozop.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/68495814836.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613013146d20c---7597140543.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/90735418294.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/12720943943.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/31678422256.pdfIn PDF document text
    • https://strechybenesov.cz/content/nonudoxodurejunis.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/xigipigadewomididipibaze.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/giruxenogunipimegozi.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/kijiduwetezikemonikavup.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/34269713440.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/12299740035.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=2nd+arc+fourth+report+ethics+in+governancePDF 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_off0000cc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC49 11040 bytes
SHA-256: f24ee811a28351a4c018cdeccf2e58ede808e5b7a5bf9686f7fdaba2c99dce0f
font_01_sfnt_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 17316 bytes
SHA-256: 4297aeb0fdc14c06b5437c4bccb94fdd0571035ec79ae8dcd3c9da5e184d000f
font_02_sfnt_off00011224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11224 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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