Malicious PDF — malware analysis report

Static analysis result for SHA-256 b700f23b0bd06514…

MALICIOUS

PDF

95.7 KB Created: 2021-09-05 22:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bb7248ea543359bc970a98b808e0b9a0 SHA-1: b4f242226879f5ebe2b99e615e763368ace069b1 SHA-256: b700f23b0bd0651411d1712b8e7418883a392c5e64b4c9dc2022e03911bfc012
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to redirect users to malicious content. The presence of external URI links and the overall structure point towards an attempt to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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=comprehension+worksheets+11th+grade PDF link annotation
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2e821307c---99472437414.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108669112c49---59422848346.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/vanosovito.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/41767329364.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/waxidofozenewik.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fabe80e2859---jirakedanegevalazutam.pdfIn PDF document text
    • http://tencanpowder.com/d/files/panotedasilarodabigadim.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/84579857962.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/posazemezidi.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a650cddd1c---56487714272.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/22531332787.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/mogoveduruwavowitesulax.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/67028375203.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/56193123474.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/3c87dbfa31989be14af977a10466574b/sagixodiwuzepi.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/50989793543.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134166db0092---35807606159.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/96295110362.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/22f64743429547177a594a6fc94cd023/37383600597.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/tenitijixumajobejita.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/xivoxow.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210721060200.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/lotusujibagifopefadoj.pdfIn PDF document text
    • http://sobsai.com/ckfinder/userfiles/files/67497864042.pdfIn PDF document text
    • https://ultralloy.net/upload/files/33834527529.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607157021f3a5---nevapimavamevoxaz.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AA 11052 bytes
SHA-256: bbc21bdef6c170aa92c006b51e1e6bedef2ff83f069eb0bccce26ce40ac22093
font_01_sfnt_off00012a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A28 18052 bytes
SHA-256: 3071017c4bd3398b6cd4dc6d1dfa16dcde2d4e068a74aaa6810c01e3fc33599a
font_02_sfnt_off0001589a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1589A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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