Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace7c103be03224c…

MALICIOUS

PDF

82.7 KB Created: 2021-09-07 11:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8da1a8bdcd92dcc882f2ce7b9c797f76 SHA-1: 6b12b804e25a288ba9c5b0bf213a4a8e01df1912 SHA-256: ace7c103be03224cc7ec6c1c74094af4040e4164fa5c31c476a1c60c14ec53cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs that point to compromised websites and disposable hosting, characteristic of a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://catamma.ru/uplcv?utm_term=fire+sense+patio+heater+costco+manual PDF link annotation
    • https://hitourkorea.com/FileData/ckfinder/files/20210818_139C653BD2A45EB7.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7b91a9300---9746207805.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/xewetulexovebalejepari.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/pezosuzaxofufovaf.pdfIn PDF document text
    • http://vestmorecapital.com/images/epost/fowufo.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-7/file/birobakodegawe.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/42964946388.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/xixevudotadetun.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/34116540982.pdfIn PDF document text
    • https://qnzar.com/files/femoba.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/q3h744mp748fmclhfn3hso58lc/bovezalekuwobawigufuxir.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/xomiwazimiko.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858ba9e9eac---20152939057.pdfIn PDF document text
    • http://citysuji.com/ckfinder/userfiles/files/10022016519.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608695189130e---37110304388.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/28483595127.pdfIn PDF document text
    • https://vinacoma3.vn/userfiles/file/kagopukaburapepeb.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/27665518776.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/85bg08b3v55jc526q3htr5u7u0/69068541550.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/65061516136.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121743a91fab---38488827282.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/wijiri.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/jilawatavomisatotujida.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ag8m1r163o6alql07u89d4r960/67169526527.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 17208 bytes
SHA-256: a75211ea95405a66f9f8395b69b5f38da6a8e9ccfbb3b702d16d378b951de824
font_01_sfnt_off00010c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9F 10716 bytes
SHA-256: e03a31ac30e525c9dde9224cb672167c19c2b18b48ae33c5895108d5d526067a
font_02_sfnt_off00012509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12509 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.