Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c85078a8bec49bf…

MALICIOUS

PDF

86.1 KB Created: 2021-08-10 00:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 92ae30d72f2bddda13bb2db31895ed44 SHA-1: 0b040abeba46965759f524146a07c821e8d9e0ea SHA-256: 9c85078a8bec49bf1ae9b95e729bff6d8dce0c741a9ff3cdd24b95c364f2b274
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • 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://queure.ru/uplcv?utm_term=avee+music+player+pro+unlocked+apk+download PDF link annotation
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbe775220a---12834292355.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c31ef91e876---67497716014.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8d3db591d---zamupopuz.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f392a6c843---dewiza.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/85900731906.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/slfsf5n8rg9qafna2p1o57ech8/63119801260.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/78437789072.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/jdmmj26b2n5hj6opiaehfqrihu/68996767034.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073be4c36997---28495310592.pdfIn PDF document text
    • http://orem.mn/uploads/files/2420388032.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082e4b57f812---duwemesapekozujinu.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607830a0257bf---kazebokanomuxudi.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9ntpsa3j4p53598k633a1g1ni3/87037270715.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/38421426454.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/wepezopal.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/5e71c76b7eed9dab47ffb47c4136d226/mobematewozavu.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609291bebd7bc---66618678150.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/12041149186.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160deeed36f142---28399392417.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/puvagerugiwan.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/teretulojevonufepipugewu.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/puravofafazokinawoneval.pdfIn PDF document text
    • https://medtek.vn/storage/file/96351550248.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/86457431663.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/70578810592.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_off0000ecb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 16672 bytes
SHA-256: 56965fe7492800e997e84cd4893252032d5cfb99186f14240ac0339eba32bb79
font_01_sfnt_off0001179c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB3 11016 bytes
SHA-256: 2deaa1b12d21387852f5bfa12d24eae40487bbd3f6e30036504f100109dd054c

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