Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1da2f32f3417bd…

MALICIOUS

PDF

84.9 KB Created: 2021-09-23 10:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8fd4444af166f05b2af0585c217a6b8d SHA-1: 8fdad2e90508840949da6947811ca39a0d9cf826 SHA-256: eb1da2f32f3417bd6fa9ed03cbd609a1f81967b5804f5b2b84ad1316a408a40c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by multiple heuristics and an ML classifier, specifically identified as a phishing trojan. It contains numerous external URIs and links to potentially compromised WordPress upload storage, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristic firings indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://medvor.ru/uplcv?utm_term=the+fate+of+the+furious+movie+online PDF link annotation
    • http://gradn.ru/uploades/fckeditorfile/rulezimirujivajodalubul.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337e86ef70d---nufazesuwemomamosesexegov.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/xanumi.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/noladibapej.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/88752125595.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210911_88CE24D5C2EB1CB3.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/4250cdc78a6d30d40a87f90ffc03f879/62455854210.pdfIn PDF document text
    • http://tongkhomica.com/upload/files/guzut.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///60113999316.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/jafof.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/tomixu.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/9144046727.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/14143051510.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210917003734.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/71215513022.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210916063548.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/84232891349.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161443b6cb2a9f---34502249617.pdfIn PDF document text
    • https://tmtteks.com/files/mabelanufixatifetezaxili.pdfIn PDF document text
    • http://hiniceshine.com/upload/10557696060.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/fojoladezida.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/remanex.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b4f891b3b3---lilibadukonapuxaluru.pdfIn PDF document text
    • https://fong-cai.com/upload/files/pikes.pdfIn PDF document text
    • https://ibericadearmerias.com/file/nasoxopexibe.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_off0000e37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB96 10608 bytes
SHA-256: 1146fcfedef237cba83d1fc89aecc250d2e1af70214d8190e59be1c3d3dc36be
font_02_sfnt_off000113ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AC 19236 bytes
SHA-256: dc60a1608b706ed4cebdb3649b2d0ddc5636891bcdee20581b2553efc3bcc9c8

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