Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ddff0c86748248…

MALICIOUS

PDF

87.5 KB Created: 2021-09-09 07:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 206f637c77969ebc97436ae5e2f975c4 SHA-1: f71feb011c9b55c4a9f293f8ffb7c0d57b29f2c3 SHA-256: 63ddff0c867482485eec28ba52fe0ec0dc7d6dfcac156f3c214ef3e9101c1c32
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to potentially compromised or disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://guerrazzi.info/userfiles/files/27779636903.pdf In PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/turelomufokisisikal.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/89432292162.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1612f13f347793---76007113889.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613825ff78f07---37109491974.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/19756341236.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/47985576540.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/zaxapogojifufuxupegid.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/90729968304.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/vodebofefeganinajit.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/lotobigig.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/mokoxonukisovelupitoxag.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/76816891477.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/64979266430.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/bdb8b562349f7c976cc90fd6a1d69873/xagaxaremogig.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613918c7c5c47---26381615713.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zafavifererorenifinisote.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/batazifajimaxuxopezemof.pdfIn PDF document text
    • https://groupunsur2.com/contents/files/1414393645.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/92282286154.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/67422424155.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/60129041993.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/3321734997.pdfIn PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/38756916262.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=build+library+android+studioPDF 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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 17284 bytes
SHA-256: b85ba6bc94fc100d16171dd73b427f5ced55febacde2a422d1e176fe813978ca
font_02_sfnt_off0001385f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385F 10516 bytes
SHA-256: 5c5c6c045b82690c866c72f2ac4ae4ea1a320e5065d8e07433d5d6a8e9af4703

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