Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c30906868fc4ac7…

MALICIOUS

PDF

143.7 KB Created: 2021-06-27 00:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2a1bf5b19bc5d9c27695a664a2b6ee91 SHA-1: a5d90baa101e487453864859240a1e034e74ca6a SHA-256: 7c30906868fc4ac7c551383bac152fba5b3a703697549476ce966bb5bc86ce26
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8107

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://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a847b787b27---17449154630.pdf In PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607069aed3d3e---namutamusate.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lnlkpld9e4vquji29v3etci1fp/65233199493.pdfIn PDF document text
    • https://menu2uplus.com/images/file/4447489373.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/2f233cb65446e4bcc09bffa3230b5c48/19162946408.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/diwuf.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/59760111c6ac990f36d5e6dea1a65613/5974621057.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/fudefamevadipaniwefafufa.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/64034260d71de331dd155b253ace8eca/39760030427.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/bufite.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/gekizakifemobexe.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/e9hg416ubsn1h4ptab2oifh1fq/57343601433.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1fc2ad0bb9bd5948af2be30058feaca5/gokixe.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/af7c20663cce6a300798b4947381950a/fazesatowebijiduselu.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/2d4f5b65392c85e2159c148850cadd1d/kujasow.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1bec3c30e---66928383150.pdfIn PDF document text
    • https://tecnicamistasnc.it/file/73210873602.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/jimaworek.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/10418155828.pdfIn PDF document text
    • http://inlygiaylynhua.com/upload/files/30927303931.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/80454465212.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd5372bb0a---judolobojakonogisi.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/94592143249.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/2ghsfss9pneapfc6vrs95ebsnn/lumekuwusesefilirag.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/godibavaj.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f2c21fd80---83650182445.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=move+heaven+and+earth+synonymPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00013c10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13C10 35432 bytes
SHA-256: af77d66b6c8c5315b1b3b44c99da6e30df02533f46729d85cc4dfa6e97c7515e
font_01_sfnt_off00017f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F17 10548 bytes
SHA-256: c0aaad3d8e9ae9424e86137f82279afede5382b7ab7b6e41279b3544eb245808
font_02_sfnt_off00019704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19704 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001af16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF16 36280 bytes
SHA-256: 996d052aad48fe9294fce5a344487c8dc6f6cd0602c1ed83d3bd871ca2d7eac5
font_04_sfnt_off0001fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDCC 16628 bytes
SHA-256: 2265b4157e2f4b54026c8253dd332658f86d0d3dd9af50f66743a67bfc230d95

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