Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee4e74a5d114325…

MALICIOUS

PDF

72.5 KB Created: 2021-02-13 10:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f930ff85618ae1eb0f0216a12b025c02 SHA-1: b14bb9ced5721abf86a293fe51b78fa57e2e7134 SHA-256: 8ee4e74a5d114325624f48c6031b46d3eb23f7d02f00b9677d396bb220e087af
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, forming a link farm, with the primary URL being `https://maypoin.ru/wix?keyword=st+patrick%2527s+church+farmington+ct+addition`. While no scripts were explicitly extracted, the PDF structure and the nature of the link farm suggest an attempt to redirect users to potentially malicious or phishing 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
  • 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.
  • 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://maypoin.ru/wix?keyword=st+patrick%2527s+church+farmington+ct+addition PDF link annotation
    • https://musekakilex.weebly.com/uploads/1/3/1/4/131406804/3775326d5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_601b2562d2867.pdfIn PDF document text
    • https://cdn.sqhk.co/pixanetu/iTgcABR/rinasuju.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/he1jagc/3342628097.pdfIn PDF document text
    • https://cdn.sqhk.co/tupuxinekowa/igecIif/nagawan.pdfIn PDF document text
    • https://wutosalix.weebly.com/uploads/1/3/4/6/134635680/9745404.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/gcWhcgd/49728899318.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/zichcux/how_to_find_screen_time_passcode_hack.pdfIn PDF document text
    • https://siromalad.weebly.com/uploads/1/3/5/3/135312661/4725908.pdfIn PDF document text
    • https://cdn.sqhk.co/moleselofa/DKjejaV/gugesotifemenafo.pdfIn PDF document text
    • https://rataputi.weebly.com/uploads/1/3/1/4/131407353/5c1d03db8a0c36.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/godoremitiwuja/net_framework_windows_10_1809.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/ipcc_report_on_land.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_off0000df7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 5740 bytes
SHA-256: 3390731325d992b3b710f326e895729304b96401d71ac5a249a40b60e7ff0257
font_01_sfnt_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 9936 bytes
SHA-256: ed5ebd265a638db2f4dc72a2fd414071e2b4cde9bcc95245a3d9fac745a85990

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