Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fcec487585bcba…

MALICIOUS

PDF

82.9 KB Created: 2021-05-23 01:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aad0c94e76753969df8ab4ef800a023c SHA-1: de1c466381eebb0f23858dc61bbf2ef81ee8529b SHA-256: e8fcec487585bcba081364c6dde890519f349067340ed250c877836980ce3c7a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/strik?utm_term=usa+state+capitals+abbreviations+printable+worksheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492245/normal_605fdcbb464fb.pdfIn PDF document text
    • https://popokafiri.weebly.com/uploads/1/3/1/4/131437291/fosewizikam-wovitotu-rijamisenu.pdfIn PDF document text
    • https://zevupizufaf.weebly.com/uploads/1/3/4/3/134315684/377800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_5fce0f6bd510b.pdfIn PDF document text
    • https://wimuwiberajiwas.weebly.com/uploads/1/3/5/9/135965043/8937368.pdfIn PDF document text
    • https://bagerukuvimi.weebly.com/uploads/1/3/2/8/132815916/jusituxos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412181/normal_6023341cc929f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_6041c4d3cf6a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486778/normal_5fe3dbcb011e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5ff88920c6daa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494668/normal_6015b1b345e98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388289/normal_5fe0be56bba00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_6062f66f8107a.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/5122846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_6046f11c483ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421040/normal_6001bfc0cf81f.pdfIn PDF document text
    • https://tovexalo.weebly.com/uploads/1/3/5/3/135348509/powisojeb.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/dikopavosa.pdfIn PDF document text
    • https://mizefubu.weebly.com/uploads/1/3/4/6/134637235/mopazokeku_tibovelazixa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387928/normal_5fe1eab36baec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387811/normal_6000b526a51ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ae04f757-f33a-4916-b6ee-519cc38954d2/27649338625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d067e40-0591-487b-8b20-cbd037bf2eda/30491483755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a754f7f4-7337-489a-bb1c-0ff4759a0c29/dekabuvasedobivedi.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_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 5156 bytes
SHA-256: 71417c238d362799bcff39a83404a39b21c545d6e2e3664d124f446c7154b570
font_01_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 11480 bytes
SHA-256: 327b441f8d564ea92d5bfc91ef7437ea1aae3f023a624c2face3bddb7f0023ae
font_02_sfnt_off00012f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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