Malicious PDF — malware analysis report

Static analysis result for SHA-256 1088032886c0f052…

MALICIOUS

PDF

75.5 KB Created: 2021-09-05 16:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 546c823f8a923230eee56e77c3688348 SHA-1: b138a532117ad4da649d87d91692f84f4ad302e0 SHA-256: 1088032886c0f0527be650a5d377b61701cd3d5e1f167937301cc89d508035bd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories. These links are likely intended to lead users to phishing pages or further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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 http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e04d078e44---furepirogamajevupujas.pdf In PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/85098797737.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/29527379606.pdfIn PDF document text
    • http://ccadl.com/files/20210725102031.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/pozanenomajem.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d4d7752f32c73165aec332bd741b25e/sudobezenem.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/15e00a4ab068e0435e2ebad2ba0a7886/savusoralagabez.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/52073395924.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/45147986060.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d79338474b4f0e43ac44e6e004087e47/suvifujuzepirasewozeka.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/77107034434.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/07/files/210704211842.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/3ctr7csjh460qjgcrvsimdpiad/63536251820.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e072f0cac---rewomikupo.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/vofasamujemeralo.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27754977ee---susixeximunijalix.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608496cb3687b---seforogetugorikamumigemez.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/vlrccdusccsm1ke677h3o5f9qh/mewepijikakugepewiku.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/lunurajininulaboledaraku.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/dotipowoluselapebinopanow.pdfIn PDF document text
    • http://alkanboya.com/files/file///93412782277.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/26335273157.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/53120557095.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/50fb402341c7af77db3b0f8a1fdaf4bc/vadezigenud.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/f9f3bab807f782de9df64e583d6b6a02/87108321041.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/1982ba7e2c0baa1c0ecf16d9e2c72977/fokoruvewadoraxokatap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=formasi+cpns+kemenag+diy+2019+pdfPDF 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_off0000c272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC272 16436 bytes
SHA-256: fd86038c65513908bbfb649fe3faab08a908fd3b2159d2edaa6ef3c5d08fd4cb
font_01_sfnt_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 11464 bytes
SHA-256: 29d0cd411c4afdbc7e8be02a7bb7c5d89473c00933472f6c973b273f50f546d8
font_02_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1