Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7328c2a992591c…

MALICIOUS

PDF

74.7 KB Created: 2021-09-06 03:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d804171beb8125cae33837680170eeee SHA-1: 101195e8a67ca6b96155bbc1226c15d28498d3a6 SHA-256: da7328c2a992591cc22a483ae4eadfcda362ccfe362e3c415ced07f8ba1ea2d9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, many hosted on compromised or disposable domains, suggests it functions as a lure to phishing or malware distribution sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to the document being a non-clustered link farm on disposable hosting, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=fiat+500+sport+air+manual PDF link annotation
    • http://ski-experience-japan.com/images/blog//file/forapodigiti.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/t8snt83slh2o7top3addqdeuug/sotuvabevek.pdfIn PDF document text
    • http://www.edgartownschool.org/uploads/files/11410465602.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc635e6fa2---wojivuxibegi.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/22037261800.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/504154a43a7b641bc98cbfcc2ede79a3/jebupulokupo.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/bojonorevogudinuzoginowe.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/jipogevikukolabonejep.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b16933b0ef2684a7825d4fdc6c1abf37/25639986017.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/minum.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/52b8fbfd8bfafa1287266e90bb03cb08/93842403287.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2d705ba33---xeserisofakexubuxadoba.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/putogukulosofesez.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/afd9b0de04b43cf5301ab0d84473eb1f/gulezozo.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/pugopujajemalapinen.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/moxagi.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/tomopi.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f2b7bf6d3---44997210255.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/c6ef373e28694ffa24db70b0b066f93e/xajeza.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/22202172629.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/tobevitupadagaderupov.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b22fafe0936---nijosegogu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE03 10616 bytes
SHA-256: aac4010c946c7b4d147ff51b74e31139e601b64a608203b8699d48b50e914601
font_01_sfnt_off0000d643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD643 17884 bytes
SHA-256: 7797417cf0082ec104c8736f40a04aa017e75babdd3ea7c02a3323fe73bee144
font_02_sfnt_off00010519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10519 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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