Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abdca4568305721…

MALICIOUS

PDF

80.0 KB Created: 2021-09-19 00:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ee4faf32e9112e82f6409d48059a9dd7 SHA-1: b02c06e94eef304db14ac3aaac6bfc72a6b6878f SHA-256: 2abdca45683057213bc8bd422e6e08032c225ee119479cb5580b863461b28302
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern. While no scripts were explicitly extracted, the presence of external URIs and the overall structure suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dortmundpools.com/contents/files/35292352507.pdf In PDF document text
    • http://pbpharm.com/upload/files/58407915947.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/dorub.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e410620d10---kopuz.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/35167664314.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/7520927331.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210914104343.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/sunagoguzix.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311811b2421---71442172432.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/timaxutore.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/kemabefojunofeka.pdfIn PDF document text
    • http://huefpdf.org/upload/file/17413844721.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/nisuvamimodojubegojeguguf.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/79422291637.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/tebewojofovisutuwidire.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/gixazeredurenulajo.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/11543620005.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/84779299656.pdfIn PDF document text
    • http://juentai.com/userfiles/files/55213360706.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/6115273248.pdfIn PDF document text
    • https://supermovi.com/userfiles/files/34526875877.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090810141840.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/56302642364.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/fetewafe.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/jegugunujef.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/2158412420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=itali+gtb+gta+5PDF 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_off0000d3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 18528 bytes
SHA-256: fe84e3f5ea971aba0ea1f69903a1304c3e8641fd787914eb294417dce4876dd9
font_02_sfnt_off00011c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5E 9884 bytes
SHA-256: f07912ee5a173b40d501f761630dc78e26ef890ceac817c8b62217f3b756a66c