Malicious PDF — malware analysis report

Static analysis result for SHA-256 567e492e4e051c84…

MALICIOUS

PDF

91.6 KB Created: 2021-05-07 06:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 84cbe5bd6732e1be8044d30d01022f9a SHA-1: 549e0ad82143c83cf618cf1111c201fc555485d5 SHA-256: 567e492e4e051c84ecfef2d195fd69a04721c0c77a2aab0e32ce54743287bfe3
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The embedded URL and the PDF link farm heuristic indicate an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'the crucible a play in four acts pdf', likely a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=the+crucible+a+play+in+four+acts+pdf PDF link annotation
    • http://smartcreditcheck.info/cabala_e_antroposofia6707a.pdfIn PDF document text
    • https://notesorujul.weebly.com/uploads/1/3/1/4/131407176/9549540.pdfIn PDF document text
    • http://ekzo-fruit.ru/kovifbt4hx.pdfIn PDF document text
    • http://prizinsta.site/nekaragajugiwojutiberanar5hafw.pdfIn PDF document text
    • http://creamwalls.online/17182583671n0air.pdfIn PDF document text
    • https://cdn.sqhk.co/sarodeduz/jfy9Tif/resume_references_template.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/nafimu-wogemov.pdfIn PDF document text
    • https://levavago.weebly.com/uploads/1/3/5/3/135343263/pemedegowipufirefim.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/aHhOujm/color_chart_hair.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/jhqLPvC/84528456975.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/uAvsjgV/93392538104.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/chjdhdh/82292682408.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/4ca101f9-0ef3-4f37-979c-29a5b493e92b/64014026935.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/3271479540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90fd8890-f247-4657-9a41-c83207476d8f/raneno.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/asphalt_8_airborne_hack_file_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/ministry_of_finance_economic_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b3fd81-de0b-42de-ab0f-c46758a348b8/lotifogagaleseladudap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a76a1bb-97df-4f79-b7b7-8a72fdb87440/how_to_access_xfinity_cloud_dvr.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_off000129a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A7 5432 bytes
SHA-256: 8165fe3104d209164f70aee951555d493ff5b3e4a730b060359365ecbf140e78
font_01_sfnt_off00013c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C22 10780 bytes
SHA-256: 2a403352e094cb3c09a86bae28c1d1ab12ecc4a179b4b884ae005e10c042569a

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