Malicious PDF — malware analysis report

Static analysis result for SHA-256 0158f29e3fec273e…

MALICIOUS

PDF

75.5 KB Created: 2021-04-07 02:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a8f8fcfabdbd3dc2ea03fbeb041b47ae SHA-1: 197177ae27280cefd5c36b9682a231f4d7d2c1fd SHA-256: 0158f29e3fec273e26adb6a4c1d5d666e85aa879aab1276cec6865ef752b4dc9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://ponafet.ru/strik?utm_term=big+easy+turkey+fryer+parts PDF link annotation
    • http://peteferix.mypressonline.com/98675723573.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/ieKhahj/giant_robot_alien_movie.pdfIn PDF document text
    • http://8bitbeardsco.com/58466867314n1osc.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/bruchgleichungen_arbeitsblatt.pdfIn PDF document text
    • http://1ux.site/zegelevuwanimulagute0tb8g.pdfIn PDF document text
    • http://mon-compte-cmb.best/870874525818e0hj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_606cec12b6495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_6060e87263bcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414672/normal_5fce9e595ce3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413978/normal_6019c92531637.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474736/normal_5fdfaf12eaf57.pdfIn PDF document text
    • http://lightly.store/xexejezuuz083.pdfIn PDF document text
    • https://cdn.sqhk.co/sokodajep/hRhcTjf/51265167507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_606588c90954b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498348/normal_6056ceaca3758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450045/normal_6039f4733fd0b.pdfIn PDF document text
    • https://cdn.sqhk.co/teruzemoru/hiShfR0/kifipefimufi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421342/normal_5fce22b5855a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461216/normal_5fdd882b43413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rejiner/boot_manager_donator_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/benue_state_university_course_form.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_off0000e7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FC 5252 bytes
SHA-256: 54f28f9653a9ae30d578d0c0cbb637312592f94c4f7c55c15c8b29cdf64454c0
font_01_sfnt_off0000fa06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA06 10896 bytes
SHA-256: 29f54d8aace28365ad4b49078a53354261b766871481f40a9fb4dd9ada01eba8

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