Malicious PDF — malware analysis report

Static analysis result for SHA-256 84082b37f1237fa0…

MALICIOUS

PDF

81.1 KB Created: 2021-09-19 04:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5f84fd96508904fe57cf164e5b5c642e SHA-1: 0c8e22a5783eb819696ac9ba37c277414d4aa954 SHA-256: 84082b37f1237fa08d9c7aa4ec23e5b180f0ca10f2d5fb6ee794bfa65fb234e4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, many pointing to compromised WordPress upload storage or disposable hosting. The URLs suggest a lure related to 'free PSN redeem codes', indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 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://huntic.ru/uplcv?utm_term=free+psn+redeem+codes+2021 PDF link annotation
    • http://yokosohk.com/files/fckfiles/file/62433686402.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/9632740894.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/46819063110.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/71676710816.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/kavojaxekeri.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd7702d62e---debaxuwilagixofedelib.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/4265746646.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/47757915802.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613707751eb4d---rijididexek.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/sekanafuded.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/19415399092.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/xuvewu.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae6d0582f2---84484148480.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/67178732190.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1631897065kPS9.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/86798828681.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161467b30ad02b---48892634975.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/5482281492.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/tetabiriri.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/38519508219.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/56610378196.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/jorumawawemixana.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_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 17952 bytes
SHA-256: 07aecc23addef153f7c5e715103ac39028d06840c80d22a5d5a145ff9a690a1b
font_01_sfnt_off00010694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAB 10548 bytes
SHA-256: 2e7ad508b81ead9d778f71a68ef1c4e0862b85926aef3da946738b97a7387e81