Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dbc7b05ad16d12…

MALICIOUS

PDF

74.0 KB Created: 2021-09-27 20:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d3f242df56f674aadf86b4c11ff29e3b SHA-1: 183361db09eca6aeefd8d541405771f6e4206475 SHA-256: 62dbc7b05ad16d120abf62f75d6e675ebe73d525267847b15a5b30adcc77b7a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The structure suggests a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://inwebjor.ru/uplcv?utm_term=wonder+woman+movie+full+movie PDF link annotation
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/to2k6g928tsplgtn40g8q5k642/63535526466.pdfIn PDF document text
    • http://abnicum.com/files/file/pobop.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/99748430393.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/17044064376.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/15727223483.pdfIn PDF document text
    • http://sql110.com/pic/30412588926.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/wejamuninitanedutajur.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/92382676341.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/gipodugen.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fawuvibuguzanofufomaxu.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/58028949838.pdfIn PDF document text
    • http://goldia.cz/data/file/gazubu.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/96978057922.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/23724910387.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/31628021092.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca8d5b4e70---18708575901.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/63779571989.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210903135952.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/da24134165a8144b769e00ebe14e2bc3/sozeteziwejimukalajuv.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/77611608259.pdfIn PDF document text
    • https://online-wums.com/files/files/42210548041.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/tomekutinusujugasumolox.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/93757606309.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_off0000b94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94A 10496 bytes
SHA-256: 42d4591de5550c28bc734b09a7e2f132db3b586aec8d7c92d8fa4e1e7b4d6be2
font_01_sfnt_off0000d124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD124 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 18936 bytes
SHA-256: 9f0dc9d1b485c69a5fbab0098b7c46b49a701a948eeb79a07022416ce3cc6530