Malicious PDF — malware analysis report

Static analysis result for SHA-256 87942796a04bfcd4…

MALICIOUS

PDF

67.8 KB Created: 2021-09-25 02:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d98f94490941a4a905efb3bd2c169964 SHA-1: 93dc0e788d921082ba76d15492b6c777fee682ca SHA-256: 87942796a04bfcd4606adc801e89d696b07aecc4d377e329788ccbd97aace21c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure, likely designed to trick users into clicking embedded links. The heuristic 'PDF_IMAGE_LURE' indicates it uses a screenshot to hide clickable actions, a common tactic for phishing or malware distribution. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. Although no scripts were extracted, the overall structure and URL patterns strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://tunguoilon.tunhua.vn/ipp/images/uploads/files/ribuxasegexebi.pdf In PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/pupav.pdfIn PDF document text
    • https://digireg.sk/upload/47507939704.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/16646720962.pdfIn PDF document text
    • http://secoinblock.com/upload/files/73036123625.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/getetagipujev.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/881a59180fd4471cc43c7ea6b65960d9/95958398077.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/60552016075.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/359880790.pdfIn PDF document text
    • https://bczenekar.hu/files/file/24741149505.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/75730602657.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16141399d23866---54271746975.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/tadepo.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/38964162025.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/2109071837218649373sd21.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/kubuperapavenide.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/topibageze.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16142b45ae3549---90482404876.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/2953949802.pdfIn PDF document text
    • http://parfumland.sk/upl/jafosuborevenar.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/88471ddfdda88da15dc5d5b95a55fe0c/xuzarizekewimobufakumi.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/11890576629.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/balanitifugabitavub.pdfIn PDF document text
    • http://unityproductions.com/upload/files/finomatikekomija.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=world+of+warcraft+for+android+free+downloadPDF 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_off0000aedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDF 10380 bytes
SHA-256: 6c8ad5ee8b8035ed598d4d0d2d16515cfaa1dc2d235887dfc5efe45dfc5b9ad0
font_01_sfnt_off0000c67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67D 14100 bytes
SHA-256: 90a464a7440598c571535dcff287550fdb20b70bd7b81b9f5a86cef992ae2d80
font_02_sfnt_off0000e94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.