Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da86b5df10344f9…

MALICIOUS

PDF

94.9 KB Created: 2021-07-01 00:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 76ffc07794c10bd19a2e0249534538c8 SHA-1: 61a92b6cd4ff0d49302800892f8daf8f68766fb2 SHA-256: 2da86b5df10344f930ef8f9adcef168a15f8baedbf35e1488410ee744328019e
176 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 a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://garglob.ru/uplcv?utm_term=cameos+from+celebrities PDF link annotation
    • https://prokoncept.hu/admin/blogfck/image/file/10693216029.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/djm8cb92s8dbogju5j5rnc6d08/56319599144.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/6847abe3430dfc8ffb767d0421c7db93/kexakisemojilanuzewova.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7750dc89---jivipelogivavibejut.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/xevezizelebabiviwada.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/79602679494.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/ad971fc326ba9106dfea35cd1c0f5f52/gufubemadikinawopeto.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a06bdaed5ea---18187204984.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/14053246803.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/sutupajovufota.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/55de6d25a7c82e7ef7522e0651971cc9/42123682311.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160736e70a3ef2---konokukirexutelakoxugus.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/bf8afac7b78609f0280d61ffc8fea02b/87566556552.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/40657330381.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/cc6f3b271060efcc7ac7273b9c3227ed/44539586683.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jujaxasuwopomixogototab.pdfIn PDF document text
    • https://seerupit.dk/assens/file/denereduxefunexamewenumoz.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/02dc580651025e06694f136ac3fc2780/medolur.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/35825830069.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609053c557a81---golewizasoxipobefat.pdfPDF link annotation
    • https://betenrealestate.com/sites/default/files/file/jagej.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/tuwakizine.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6aa7b6eb23---32103668649.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/60722657070.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_off0001127f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127F 16968 bytes
SHA-256: 2715a0816ba93e05b11de9b80a72b6b03dfc298a525b09c51f7b309618403bce
font_01_sfnt_off00013e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8F 10564 bytes
SHA-256: b11cdc43a8a835b4aacf62067933da96ec8c4f8e5a05821ccf6243b9101fd89b
font_02_sfnt_off000156b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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