Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e176b7cdb160a11…

MALICIOUS

PDF

81.8 KB Created: 2021-09-21 08:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e43b641718b5aacb13f235673207b0bd SHA-1: 8c5116540686776bc6f7f7abb9721e45731631b1 SHA-256: 2e176b7cdb160a11f213ea58d62928796f06b815ad56f30ac9ab8c4e10cc18f4
176 Risk Score

Malware Insights

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

This PDF sample was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous links pointing to compromised CMS uploads and disposable hosting indicates a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic findings suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://quiltingacademy.net/fckeditor/userfiles/file/63829458642.pdf In PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614495085adbb---55611446919.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/goxaworixodomonevezit.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/voduzisep.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161347cce8d550---jober.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161404c904e843---vumujavutekexivepe.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/7c38c6a99362ffdf5f2b95b96f6f58d3/97114576201.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/78591851893.pdfPDF link annotation
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16137c328f2e9d---dubusugobisupunujezeworu.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/vibabixavipip.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/6249967528.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/74970019258.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/52412253409.pdfIn PDF document text
    • http://rubensova16.cz/files/file/gejitasovon.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/55056535187.pdfIn PDF document text
    • http://szm.hu/userfiles/file/zonijizega.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/doratumaninebunoj.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/bajadinixujokofomapafos.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/guvufililopufufak.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/wogakekavalabotovekiziwid.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/gosaboputuza.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/56244160056.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=monster+hunter+stories+full+version+apkPDF 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_off0000db85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39C 10708 bytes
SHA-256: 1888cd8a433752955e2cd7d6e7526ca03e401a7a7663108cf4355f0185e7a2aa
font_02_sfnt_off00010c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2D 17468 bytes
SHA-256: 84fa6c856823c6044da1fbd7daf06e401c78e66b87a4a9be563359a33148caa3

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