Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ab9d63309d56de…

MALICIOUS

PDF

93.6 KB Created: 2021-06-10 15:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 63ddc5c968a2e67d45a9a28048b4124c SHA-1: 8d03cf3cc9d92f9bb5bf0fdc100747da31e3fc93 SHA-256: f5ab9d63309d56dee177a15aef812d7f4b1c9647f2762ab895351731c79232d4
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external sites, many of which appear to be compromised WordPress installations, suggesting a link farm designed to distribute malware. The document's content, though heavily obfuscated, includes keywords related to free novel downloads, acting as a lure to encourage users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=swathi+monthly+novels+pdf+free+download PDF link annotation
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb742f18c47---32515074051.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608307ef57468---xozosaxisiwinebepo.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7gmfpv6qacj3h00phi7teroe4s/bagabuvu.pdfIn PDF document text
    • https://mmszke.hu/files/file/44108272332.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/9d6fb1ad85fc421808741bbba314a383/13826782198.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607077f45c29d---zupezoxezisel.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/33826314627.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dcd88f319---45714548700.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/nomototixavogizedigozefo.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/89967cc954b60a2b87489084b872f7fc/38169299656.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/21580707855.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16096791c24697---67346870052.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a2663222cd378bd26ed1b28c8f754500/rosekaga.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/54623248226.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3c0b6036041b6a9623da631aefa15d01/risepikep.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072d28ea0cd4---47337582297.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013dc9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13DC9 18872 bytes
SHA-256: cfc25970de021859e6b5478222b51d603f14af70adfc49116b22e2ec3021e6a3
font_00_sfnt_off00010299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 5640 bytes
SHA-256: 4d990136f902eec34c604bbf2f9f92dc53ec407871ae10bc18cd32f2a970008a
font_01_sfnt_off000115ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BA 11728 bytes
SHA-256: 7adc7a40152e28290837d60efd68a556c4462022bfe8133a7a807e0a5392f9d1
font_03_sfnt_off00015b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B8F 3256 bytes
SHA-256: 09b7f68e3878b933b8cff830a9b77aa3b386b739f41ecfb71eb429bdace921cb

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