Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe77657770a9969…

MALICIOUS

PDF

83.2 KB Created: 2021-08-21 02:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e0f8e0bd604fd96be0a67e6f1bda6504 SHA-1: e6988659d7304babd8dfd6169a98a0a121d9c518 SHA-256: dfe77657770a9969ca64cbbe982834da70f36e55020789a836f5dc1c866c4e9e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which point to compromised WordPress sites and disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were directly extracted, the structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7117

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aab9a95318---pumomedawubokutufixono.pdf In PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/c9f8c9a846ecfdab7124352398a1edd3/19421146792.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/4eba2cc26c6128dd32ebbae698edaa1a/jokeso.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/38906832829.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/kojujukavanupilutolawir.pdfIn PDF document text
    • https://go2germany.ru/files/file/ditawepugolojavebuduwadem.pdfIn PDF document text
    • http://canadanur.com/resimler/files/zisezafikawiwogadiv.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/14lm7hblf6muvq3m5j0r525ln0/vanodanodivowira.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/fezukorazovizikonunil.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/sunimu.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf50d46dddd---werorevanuwonubet.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/33193478079.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c26846f797---lezemonetadanolaxes.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/12621153635.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/qlat45qsavf2vfjl294kfioqn2/tanizirufedesem.pdfIn PDF document text
    • http://martonelektro.hu/files/file/milekozuvevoputuvazegi.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/solonirovozarivetekire.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608517522e3ec---sowaburaxisow.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/vekamokoromopusadalimonor.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609282ff8df27---lopovoberubikepep.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e54d4a35bc68bce5b12b5e45a0efc57/2432975095.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/14137598438.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+use+i+touch+watchPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 17564 bytes
SHA-256: c0ec3c5a66f644fb0db0a8df0955b7cdd071fbab56ee52d6a28dca4390cffee8
font_01_sfnt_off000127d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D5 10252 bytes
SHA-256: 98165ac9af92f67759ea8c4baaa98619285976c2abec2825e350a08c760a5ff6