Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67c592c8ebf58a7…

MALICIOUS

PDF

88.3 KB Created: 2021-09-04 07:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2b9ac909eb0f5c8dd4aacbf9d4b0022a SHA-1: 61f4cbd634f4a2521a834f5a9abb391088e5cba2 SHA-256: d67c592c8ebf58a7ca6e8e78649700c68ab8873a673e3e3e083f7b58b6a35383
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. These URLs are structured as a link farm, suggesting an attempt to direct users to malicious content or phishing sites. No scripts were extracted from this sample, but the overall structure and URL distribution strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://huntic.ru/uplcv?utm_term=the+aeneid+fitzgerald+pdf PDF link annotation
    • http://topstec.com/d/files/zujupasa.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/27343495707.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/23118435230.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/89579490783.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021082609502489.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/f745416f8100ae31b33f74ccc119812f/29703540208.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/12952587780.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/429b75e92eb772236eac8beb0bd7de03/62078141445.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160806e76131ff---69856595449.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/64136956663.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/wiwojagomo.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/sebunozujuriligud.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/5so3iri69bb9d0g39op1u8h2o0/92909265247.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/56835535365.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/rurunoganupivedobirofile.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/17602993365.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/5m3lfrpida0e9q5conscu0fodp/zigizodolexux.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/94476918212.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1294417b2---lojizutufip.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/029d6083c318ee846785882743960c16/kekujubutiru.pdfIn PDF document text
    • http://roocenter.ru/upload/file/44948498611.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/aa0a9b7009c3c8ac9e7038386bdd7123/19918354026.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/lesavulotasenif.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_off0000f311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF311 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B28 10512 bytes
SHA-256: 49f5af754a67383d2108b4929583120e6d3a056fe8efb420ebd2f9be566e117e
font_02_sfnt_off000122c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C2 18624 bytes
SHA-256: 302e94b474505bef6de29020404f70a6e3bda8400056ccf1cbc02fa62d9ec492

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