Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f25e6f497b477d1…

MALICIOUS

PDF

94.2 KB Created: 2021-09-01 06:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dfd160d1cbd163656c11fe4a7103dd73 SHA-1: 66e95b4dff5052a4892cd01578ad1e4a214adf3e SHA-256: 9f25e6f497b477d19100675cdda261c1b7d50515b20f2585c1d746720cdbbcb5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous links hosted on compromised CMS platforms and disposable domains, suggesting a link farm designed to redirect users to malicious payloads. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://aiwatopup.com/ckfinder/userfiles/files/80911417268.pdf In PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/muritagerawawuzanufalafif.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/33517232436.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609896ea788bf---87521026467.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/47520020741.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/9364376364.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/3a802085c44a8ae5e1cac0a5923dddf4/ralaletolujowi.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/fepug.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/48256706500.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/23820184623.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160be639c11176---fubixafumokezelel.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/vuvuzadifazexivelidubijuj.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/26057001433.pdfIn PDF document text
    • https://fultoys.com/userfiles/16151086246.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/nodugebevotamige.pdfIn PDF document text
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/78800184004.pdfIn PDF document text
    • http://cosmik-kino.ru/sadm_files/86323410511.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9cb713b70---91850957085.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ccd26c713---fafemekasomimaruzit.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/20218151455324172.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cddcb6167b---76711486172.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56f2e706c1---40543351051.pdfIn PDF document text
    • http://3q1p.com/upload/file/210709215050343752327v081h22l4.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/850c332c56457c0c6a770256c8349466.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=wifi+inspect+apk+no+rootPDF 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_off00010a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12249 18548 bytes
SHA-256: 374489254355a9dcdd5b4a9c9e2a7f0bd748f103723f16612e031aa573d058eb
font_02_sfnt_off0001526e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1526E 10512 bytes
SHA-256: 23ec52cd9c0aa239bb8be41226388b9c05269e8f9001a99bd25b179b2cd5db71