Malicious PDF — malware analysis report

Static analysis result for SHA-256 2689a3ff029067bc…

MALICIOUS

PDF

73.8 KB Created: 2020-11-21 15:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 666dcd9f4a9a29f8b2de9340aa4ee8fa SHA-1: dc5f8e9436a94cf7a39815c2c60a3607fd918950 SHA-256: 2689a3ff029067bc91cae988cd3ce1aae8571e460e112180160628258d072702
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://traffnew.ru/123?utm_term=food+allergies+powerpoint PDF link annotation
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/manilumaj.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • https://ginefudev.weebly.com/uploads/1/3/4/4/134454890/felujopagunisij.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/vofezonusojejox.pdfIn PDF document text
    • https://pilovezodono.weebly.com/uploads/1/3/4/3/134313857/c0a180c0.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/8494558.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/1448495b2f.pdfIn PDF document text
    • https://diwopoko.weebly.com/uploads/1/3/4/5/134597367/metotepamapit-fotufawez-dexugis.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/2f330106-8173-4a34-948a-bad4cba36dfa/avast_mobile_security_premium_apk_full_version_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc31aadc-9663-494b-b338-58aae82a404c/viwaxagogojowujuwagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2984dc19-5719-4a99-89fe-bcd58b574720/74078325749.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/virginia_thrasher_twitter.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/anker_powercore_lite_20000_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/citing_evidence_worksheet_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/gazivazolipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329ba3cb-83cf-4e0e-8372-7cdd53915fb8/rekixegijuvizobekupumu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0F 1876 bytes
SHA-256: 3b8b96df2430911fa2fb6c2065012a50e51b0d5ba0e1c12c74a2cd1a443662a7
font_01_sfnt_off0000d61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61C 4964 bytes
SHA-256: 44261f5a5756be701f6a594c34e613847bd174d1009bc8ea8b4f8d3c3c214f14
font_02_sfnt_off0000e71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71F 10692 bytes
SHA-256: 8be9e735a53676a3e24a3a63d3e825ba89e614444b941135a294ebed23c886d5
font_03_sfnt_off00010bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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