Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccf7c5824486c47…

MALICIOUS

PDF

91.2 KB Created: 2021-07-05 06:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ec4d271ca8ab77924ae1ddddceafe14 SHA-1: 23d110a1fe00ad68f9c0f71b4e18f833af1c4d7c SHA-256: 5ccf7c5824486c477ff3d3bcc147172582f3c8c1bc3e7120773d7bbfe3fdaa04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The file functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites. The presence of these links suggests an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://oniceh.ru/uplcv?utm_term=agree+disagree+essay+structure
    • http://s-moonlight.com/CKEdit/upload/files/dekisazedumeroran.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/3b6fa2e1b57b8448a9cc5351fcfc13d9/gunivabolojinaposajip.pdf
    • http://cheumst.com/upload/fckeditor/file/fofaxefiwaxebuzalubilub.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/s0c758cjq4o7468sqbd835vjbv/15447740937.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609acafa9bd88---fatusolonifuwiwuwewiwaru.pdf
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/38363353821.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/e54e5300060e3a2a64d79bd9e96f2957/xokobulixegininu.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/rgf3dv2ob1l757m8oi3mcrptb8/rolikefumujisutegim.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c25d6d1eaf0---44784848349.pdf
    • http://okmarin.ru/userfiles/file/92957758145.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a87b9bd35369774ca70272925f7f822/96351305061.pdf
    • https://niboparis.com/upload/fckeditor/files/jipikibolor.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3b6428f29---latokigavasazopuzo.pdf
    • http://activesolutionelectric.com/images/file/figutavamofuvorage.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095795d16c36---ganasujuruzakulapu.pdf
    • http://brandnewgoods.net/userfiles/file/59056668278.pdf
    • http://hanasushi6.com/uploads/files/58888168326.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/46187230343.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607306cf9043b---wedaxepax.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/b5e87ee6109c61b58a02c62bc967f62d/jitozav.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/5a486d482dbc3b8d7086f575b24a7152/60204231968.pdf
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/90237706843.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf1f04eb5a---20095925993.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/09419d91b744f471eb79ed4003c4487a/lekolokixesovajevo.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/8a1947b60edb0b4ac62ada1e6df92791/folopo.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/15225f04d5c31001bb027ac763baf91b/ruvijobaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101a6.bin
58b0dfcbb9a2e072d2519e61edff0f6e7412dfdd79a8dc00bbeebb59c9f503d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 17140 bytes
font_01_sfnt_off00012dff.bin
22407f35851c0fb3d49b6e0c59db43c2b6ea27f55e5902b1aafcd662f81a268d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFF 10472 bytes
font_02_sfnt_off000145c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145C3 16792 bytes