Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68c312001837d5f…

MALICIOUS

PDF

215.1 KB Created: 2021-08-22 18:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f4e82980dd645396fb96535975db5f9e SHA-1: 2960cd674b6d2ef5d8ffaeb626f5971c623e6013 SHA-256: b68c312001837d5f023f353d484336321fc33f13c1d6accdfa01fe4def6dd46d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to compromised WordPress sites, suggests a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall structure and URL targets point to a malicious document designed to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

Heuristics 5

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=there+will+come+soft+rains+summary+quizlet PDF link annotation
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ba7c3e1fa---xubik.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/1912307987.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/duvir.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c2fa97a02---fegobimajatuzan.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com//app/webroot/uploads/ckuploads/files/53099134986.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d206a53c31---3265237932.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/jopudetilivomik.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815f25c2217---99274360274.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/10796781273.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/h7uv2e80ahhkef4bfhp57frv98/vesizok.pdfIn PDF document text
    • https://haidangpc.com/contents/files/30220326032.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ctcjhq9oab8milh9ok01p5rbgv/golipebaxamoforujexorozaj.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/60731651904.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/gelapovajukutoripolipa.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/dcbe53e218eb4054732e8dedf768d696/2710641926.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/7275962451.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/aa6729b7b04fa591a4059c6a933563a6/witubafobosow.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/juwinokutuwo.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/jilagizevu.pdfIn PDF document text
    • https://stbenedikt.ch/userfiles/files/20110054333.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f7cfd3c80---91256574434.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/zavuneniwuma.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ac597eff2944a7249b23b2db28a3ba88/ximavug.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a20ad4b59d---35841369922.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36d957a7e---nimobuwagalomi.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_off0002ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF7A 11068 bytes
SHA-256: a6bc8d6ef648b297787bac92afae6c2e0d282c771df19dd31e2ddca03864858e
font_01_sfnt_off00030941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30941 16812 bytes
SHA-256: 1a8d900e061fd5a400c8d7154dd0b6b8e699726c3c1fc38429387a553e8292d7
font_02_sfnt_off00033483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33483 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1