Malicious PDF — malware analysis report

Static analysis result for SHA-256 d278b0d2b11a0ce9…

MALICIOUS

PDF

74.7 KB Created: 2020-12-31 01:35:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4f908d00c389de7f2b40eab66fb161c7 SHA-1: 59d31e6e507aaebcc69bcc3b00e86e04ee10dd31 SHA-256: d278b0d2b11a0ce9c8b0fab3c489ce63e14ef1db1266c11df23f177cedacd653
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of embedded links, including a primary redirector URL that appears to be part of a link farm designed to distribute malicious content. The document body, though heavily obfuscated, suggests a lure related to "portal quest level 10 hack", likely intended to trick users into clicking the malicious links. No scripts were extracted, but the presence of numerous malicious links indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/strik?utm_term=portal+quest+level+10+hack In PDF document text
    • https://cdn.sqhk.co/lagitesavap/jeKhfgc/72352264876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5fd6149f1416b.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/jd6icgj/12185396398.pdfIn PDF document text
    • https://cdn.sqhk.co/govuzupikiwe/ihhjhUW/knee_reflex_test_name.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/jijdQhg/warzone_getaway_2020_download.pdfIn PDF document text
    • https://xukutejupu.weebly.com/uploads/1/3/4/4/134487517/bb8daea4ba8.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/06af3964-de04-42ae-8865-fe06963398cf/81881536715.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/24479998509.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/1485082394.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/potassium_chloride_msds_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e41329-a205-4d44-9f37-a5f4db2bbf67/refinance_rates_online.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/her_film_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/momomujuwagonixuxijemotit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7C 5332 bytes
SHA-256: 958a2f273c43e0eab65dbb46b4626fa05df98024608de3d119eae9445a6ea0a5
font_01_sfnt_off0000ef9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9D 2292 bytes
SHA-256: e26eac9065c9a76012017d219ce8b42f0c29ef93da3aa8ee3091f7f7e10bb9f4
font_02_sfnt_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 10496 bytes
SHA-256: 047a7dcf381f2cb6130a68dd1bc19e3984d16466624a245b5decb7d6845de5c1

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