Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62fe39d80aa3f6f…

MALICIOUS

PDF

84.7 KB Created: 2021-07-02 05:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9b1e65e20d217017f4d7d4c9e79efca3 SHA-1: 184b5b2a5723f8b380f302a51b8ab5c28aae3f05 SHA-256: a62fe39d80aa3f6f80003c8c60e13be2840e040ff77cfc1bc07edccf853d08bf
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely to distribute further malicious content or phish for credentials. The presence of multiple distinct hosts and the use of UTM parameters in some URLs suggest an attempt at SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/87e6f266bf93f8cd7c22df1f6e8f381f/tuzomupib.pdf In PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/98475573407.pdfIn PDF document text
    • https://davaocarrental.com/images/file/36857566020.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8409637d1---duwapetorajubo.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/dl9lv2oesk2m6frf0tqhp3uv0d/24304204128.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/s1su24m5g26statk3nngqlnsia/mikuwerufejetabapenujumij.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8a577e4c635dd219a409551628085958/25897002652.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/fekawunogakixofusupofur.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4752017bc5---fuxoxukotexowar.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6650c4b08f---fizagure.pdfIn PDF document text
    • http://maihome.hu/admin1/file/bebofererofofaluge.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/gararilu.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/966170bc3831289d1ab8243928ced5b8/naxugaduwegugiwimu.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/41164064237.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/puvotuji.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608097a878cdb---30283628558.pdfIn PDF document text
    • https://mcdpiti.com/userfiles/files/butosajibupixezeribojabi.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e5dbc100d9ede8b3df75aaff9cd89a7/42641487145.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bc94b16278c1c8d68995b81ca3a941d4/83056373506.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/82940576200.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160da30dc787b8---34408574400.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/zatadulexoj.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fc1da81bd---27601071853.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/53158862946.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6e0ba090c---vunanilesekitakemakol.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d2ebf3860---47131559847.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+a+refund+on+ps4+subscriptionPDF 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_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF02 16884 bytes
SHA-256: fafae4fa181e1f8e2eea574c193d50c55c67a89c52aa470beebdf4120e02fdc1
font_02_sfnt_off00012b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 11144 bytes
SHA-256: 3fd0deb92935386f03434beabb2975c79ed0b9a8cf89d5a8849b0f1dca57487d

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