Malicious PDF — malware analysis report

Static analysis result for SHA-256 62779e3e001756b4…

MALICIOUS

PDF

74.9 KB Created: 2021-03-30 08:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1861a0a493c141d6002e846c9ddfcabd SHA-1: acc9c5f11d6a8efa84e5c3ef7e8fbc6d372ec40a SHA-256: 62779e3e001756b4dda52f22b300bdd523ffa7a2b23b761c79cf04cc1126a0f9
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript T1553.005 Security Software Supply Chain Compromise

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of a 'Security Software Disable Instruction' heuristic indicates the document likely attempts to trick the user into lowering their defenses. The numerous embedded URLs, many hosted on disposable domains, suggest a phishing or credential harvesting attempt, or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://fokemale.ru/strik?utm_term=daily+grammar+practice+8th+grade+pdf PDF link annotation
    • https://cdn.sqhk.co/dewufidabo/jdhghbP/the_legacy_golf_course_wedding.pdfIn PDF document text
    • https://kuduxuke.weebly.com/uploads/1/3/5/3/135323303/9786657.pdfIn PDF document text
    • http://votutatiturapat.22web.org/carl_sagan_contact.pdfIn PDF document text
    • https://fazolusafiwef.weebly.com/uploads/1/3/4/5/134585025/mogimavosi-fajerefovoso-dejavutaxi-vexekal.pdfIn PDF document text
    • https://xexomogaju.weebly.com/uploads/1/3/1/4/131438449/zetineduk_simetikujiravug_pimumirofisa_wuged.pdfIn PDF document text
    • http://wonamesavap.iblogger.org/batakokidibexelumajugo.pdfIn PDF document text
    • https://lerojapozexux.weebly.com/uploads/1/3/4/0/134016693/5343513.pdfIn PDF document text
    • http://sefepov.22web.org/wixawe.pdfIn PDF document text
    • https://bezamefiparafu.weebly.com/uploads/1/3/4/6/134665790/5443000.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/7ac8a67bf6b7.pdfIn PDF document text
    • http://mivakoxukike.22web.org/28114600480.pdfIn PDF document text
    • https://cdn.sqhk.co/banibudofe/hZifKgh/executive_assistant_jobs_las_vegas.pdfIn PDF document text
    • http://kinatoguvekajux.22web.org/2015_honda_civic_secret_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/zesokepewami/hjVNihf/68117355373.pdfIn PDF document text
    • https://tevufipe.weebly.com/uploads/1/3/1/6/131606546/xunis.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/MHhdiih/61075032041.pdfIn PDF document text
    • http://soxiwokix.iblogger.org/bosageset.pdfIn PDF document text
    • https://cdn.sqhk.co/sifomujotaxa/gg3jcvu/ledunoxelog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a346011a-21ac-40aa-b2dd-04f8ba906acf/24462966606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469006ff-d83a-4fc8-8b17-c4d0e8db0d78/70029328528.pdfIn PDF document text
    • http://digomal.epizy.com/think_and_grow_rich_summary_in_marathi.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 5688 bytes
SHA-256: 981b13a9e33940c6c84f6967aa175ff04f19d9ed5fc62ea6974cc1bfd6e6bccb
font_01_sfnt_off0000f810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 11156 bytes
SHA-256: 6c46a8b3bbe88013a4c9e9538378db9ca6290bd6d0f4c5c54b9b32af72c11ee9