Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6fdc68b8689fc7…

MALICIOUS

PDF

82.5 KB Created: 2021-09-09 07:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 05f0d181303c2c0d224cd1f3008daa8a SHA-1: 250ba8f3f10cc43cf1ef956fd5c823b9270fc730 SHA-256: af6fdc68b8689fc7e9b8f91ea8e51f41298a4d2db2d38f73dec19cba442ba7b9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which are hosted on compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely leading to a second-stage download or redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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
  • 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.trackls.com/application/ckeditor/ckfinder/userfiles/files/kibog.pdf In PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134cf160e5da---67242572338.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/21490455416.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/74785849402.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/kemekixuxokonufapujag.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/xukoj.pdfIn PDF document text
    • https://amgaa.org/temp/files/suvowusuxozokezazobaxijuf.pdfIn PDF document text
    • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/77458052941.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/82577929965.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/labonaxijebokipulatusag.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/70803978417.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/wivasumi.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/rowevi.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/davifurab.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/dokotesovoxibonef.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3f8ea0d2f---52624253435.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/pifozuge.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131cef058595---damimakujo.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2842ec60db0c365bc3cab4afd76a7785/83895795122.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/73985195878.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=promising+young+woman+putlockerPDF 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_off0000d82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82B 19276 bytes
SHA-256: d517a94dc2d228cbbba96cf03baa3f26cd5810cb037a9bc7406276347bb6291d
font_01_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FB 11112 bytes
SHA-256: 532b35e06b5c2530f6cea4ba4e3113ff5170c2e4dffc8c0e2402d25cda06cd12

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