Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f7eac5630cbf74…

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 13:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9341d822b5103bc24abe50e37a7de3d3 SHA-1: 5a35ac5babd231b2a1165e0ee547c46c233b03b3 SHA-256: 69f7eac5630cbf747deeb8a62531441dd54fdee84c50f0f5d843e4a8806bf482
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Several heuristics point to the PDF containing links to potentially compromised or disposable hosting sites, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://orderbestwings.com/uploads/files/tivilegu.pdf In PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/6a9da005413f7991851c330b12f4f5c5/59942793534.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/16254302979.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/52988002761.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/17020859253.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/60828198989.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/40647374206.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ucq50d3knhv910q7pnoo1104g0/86420586770.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/xarukod.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607add0e8bdd6---xipexoxofesoramemobuvel.pdfIn PDF document text
    • http://beiks.info/public/file/71605180772.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/kurototivomofebunori.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/tozebuzila.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/96080235417.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/repiwinanazo.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/4or9ua6efa56o3nr2oerfuamd7/zutafosuvi.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/87811470534.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/32663950492.pdfPDF link annotation
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/94f43b5c70eca06a9cc6d6648c2ad821/vixiwop.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/0710576032cf68577ce18b9431eb76fb/ramebesogemewidudufef.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/memufon.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/voperez.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90e041f5b---famokaxotusu.pdfIn PDF document text
    • https://cecprint.com/images/file/88831676633.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/zujedovoli.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4424d0ba8---boxikob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=best+chess+openings+for+attacking+playersPDF 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_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000feaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAF 17932 bytes
SHA-256: 5bb45fa12bf199f6fd0bf7411b9fc76e0d054497bcbd635aeb91f40ad4e83d3e
font_02_sfnt_off00012cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC0 11016 bytes
SHA-256: 53ecc7b343ddfb5d1a5f5e65616010009db55985b0904cc8eded437ec2fe115d

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