Malicious PDF — malware analysis report

Static analysis result for SHA-256 788ceda6fe78c570…

MALICIOUS

PDF

128.8 KB Created: 2021-09-14 16:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ef5d3bf0c87e81a564b99910659925a2 SHA-1: a2cea35793cc23c17a492988974d3ad51d6b22f5 SHA-256: 788ceda6fe78c570d8ee35b3d23b555eb7c5a66c62e35095f0ba9e963b124070
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it is part of a phishing campaign. Although no scripts were explicitly extracted, the presence of embedded URLs and the callback lure heuristic indicate an attempt to deceive the user into contacting a malicious entity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b75212f7c---94905468859.pdf In PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/vanemu.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/mevowimewowomedut.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/42227232544.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/53093813677.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/47850647352.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/regazoruvokurarumapexamul.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f59d3e041c2c6478bdf2136f5f0b0061/44824854726.pdfIn PDF document text
    • https://leifs-auto.dk/images/file/vogelomotipegoxaw.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/13353157362.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/kokuxifo.pdfIn PDF document text
    • http://gojjang.com/uploads/files/jitawabivujigizomigidak.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/94943358006.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/likagabulolog.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/katogudonetoxigaz.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/85377783159.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/folanuxidipovefu.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/gojodatowufifonugapa.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfaf1178a1---42022477746.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/58855136383.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/13358347260.pdfIn PDF document text
    • http://humanlitech.com/files/files/71880135730.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/161323970cb38c---nuboparasosaterat.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/53995017852.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/26480a08108aa52b72d2adf2461ad026/baluzajudakibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=pixel+experience+nexus+6pPDF 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_off00018fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7CA 10360 bytes
SHA-256: e4d45b910b52ff493912dc36137f90595c6d5dc84b9cb0ed24b4064ca7bb4468
font_02_sfnt_off0001bf4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF4B 20292 bytes
SHA-256: 00bdd364bc571095aa74b8cd0fdec1052b71c722c927ba77a9bf1805dde85e00

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