Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b70b65d55fcd05a…

MALICIOUS

PDF

119.0 KB Created: 2021-06-28 06:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9c97a653b27b94fb75b61b8c736a8063 SHA-1: 8f6ef3768364ae1addf2a2475b126f4ef6a8629f SHA-256: 9b70b65d55fcd05ab0a196813c3f31344e1bae77410a5ff8a28f08722bfbc1d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other domains, likely serving as a distribution point for further malicious content or phishing attempts. The presence of external URIs and link farms suggests an attempt to redirect users to potentially harmful sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

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 https://synerhu.ru/uplcv?utm_term=inside+out+inside+out PDF link annotation
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607439054b1c8---80598165614.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/pofimekiropasarowun.pdfIn PDF document text
    • https://dafelia.com/files/47146245474.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/4fas5fjg10vbr9ovtbfjp3h4pn/xiripotomunuzifizofuba.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/38193679123.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/najifepudexevararef.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/poremejuvurevakelawamuxil.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b04e6f68894---84791364084.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/jakarelavibir.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/5e5658fce0c0ec1729846b93b89bf9bb/xuzexuvaxolewezo.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/2279b0a9166c7d5b4b89299d35fe4df5/welexidujogesepoz.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b83dc9486c---risuras.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/gvnbj356pt8578e4jvc4ic761r/22675351915.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/50444468063.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16090b6a7a9126---46468615037.pdfIn PDF document text
    • https://webmenuplus.com/images/file/82610436608.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/84994259410.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/bc33104ee31418cc2947888fe19381c3/56221399159.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/49769795657.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4037404ea131bc8c132051bf98fef7d3/zizanapo.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086415b545ca---kopul.pdfIn PDF document text
    • http://debden.org/userfiles/file/55486277356.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001b35d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B35D 17508 bytes
SHA-256: c323b66d1980b259a7fbee0801e8230f61917b51c84cdca6295629c86ee75d08
font_00_sfnt_off00013486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13486 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C98 25636 bytes
SHA-256: bb70a743248cb7b0d3940a4f2e9f695d6481c705bc49372d5d26efa33e0d8c12
font_02_sfnt_off00018ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AC4 5140 bytes
SHA-256: 364a8d268c99f3e5769619f21c04deb912d09b884375d8c60a77533247ff8485
font_03_sfnt_off00019d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D1F 9984 bytes
SHA-256: 85fb1db2575bdb6c5b3faa0937761208eedafa80e74f5ee89785685f3affa3ef

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