Malicious PDF — malware analysis report

Static analysis result for SHA-256 174aaa0ca91a80f5…

MALICIOUS

PDF

85.7 KB Created: 2021-07-01 12:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e4aacc573224152b1626c1ce470656fe SHA-1: fb8fb94beb28c9ebeb4b0985a8ede65000845b3d SHA-256: 174aaa0ca91a80f5fc4197a4254145770cf9edc9ba15dbcbcdc9ff667205fd46
164 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=bible+verse+for+new+believers PDF link annotation
    • http://arohitourandtravels.com/userfiles/file/pabetoxetunorotelutuza.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/jalugulazirux.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/167bab514e237a5d7b4672461271d86f/lexamejanefutodikinoxo.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5a30296b6---97828846048.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaa50dd87b---60098245932.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7bh5cv2resfnhbejbrooict58d/99614281467.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b218581e90e9d0d10f20f26bbc76ecf5/nixudele.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/ga60h3oci8kqi4qjrt3p2fdq2q/49616169115.pdfIn PDF document text
    • http://voorwindenotariaat.nl/app/webroot/files/ckeditor_files/files/82860699078.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/56424196244.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/c632e0b40f95ef730d119b2e05b88c77/pubavanafabewuxisozerege.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/51556599236.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/lapibovodaw.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/fejawimavenopamakofo.pdfIn PDF document text
    • http://amajyuku.com/files/files/begetupe.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/vokurabawosonida.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/593d8d7175c3b998075626ab36a11118/perotadevosax.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/18518031224.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/49573325034.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/judubebonemevejopodos.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/xijamafuvudewi.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c90e0bc4dfb---5098440865.pdfIn PDF document text
    • https://x-software.cz/data/file/94604450797.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/74e56f07a373e9a29e0d3357f683a375/88302104464.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_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 18060 bytes
SHA-256: c95b4b29c9bc174f8ba21062a46e2535b4bc44d62064c581e59a02003fadbd3c
font_01_sfnt_off00011a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1A 10292 bytes
SHA-256: 360d7200b5d6bb1c3a5a085dab501d152be5b2ef3c5a495240a2c6c23b9f78cb
font_02_sfnt_off0001316c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1