Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb09fd77cda9bbf4…

MALICIOUS

PDF

84.6 KB Created: 2021-03-28 06:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 45f82a7291a884c0a80a734f79c7448d SHA-1: e9734ca34138f170f5dbef017145860122ff4e0e SHA-256: fb09fd77cda9bbf402e8a36a6a006a0c0315ab456cf280e8cc8ca4a448b0e0fd
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 0.9990

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 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://fokemale.ru/strik?utm_term=would+you+rather+christmas+questions+funny PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375886/normal_5ff14063a6e4f.pdfIn PDF document text
    • https://fujerituzaxu.weebly.com/uploads/1/3/0/7/130775231/2457013.pdfIn PDF document text
    • https://zomereke.weebly.com/uploads/1/3/5/3/135397468/3828335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476427/normal_604793439fe65.pdfIn PDF document text
    • https://befunopokoxa.weebly.com/uploads/1/3/5/3/135327779/8004459.pdfIn PDF document text
    • https://melesanej.weebly.com/uploads/1/3/1/1/131163783/597574.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/dFichih/12218925277.pdfIn PDF document text
    • http://masito.space/savelev4oa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_604122f01c16d.pdfIn PDF document text
    • http://electorat.org/tirurama6u7.pdfIn PDF document text
    • http://joy-todays.online/27297170245hdmut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479691/normal_5fd636f181c5a.pdfIn PDF document text
    • http://tekplafond.xyz/77353956143qfjnd.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/T1hcgec/jatakerala.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/ijYfggb/like_app_video_under_review.pdfIn PDF document text
    • http://setlyb.online/75423817704ophtj.pdfIn PDF document text
    • http://help-service-support.com/baldurs_gate_dark_alliance_2_xbox_iso3mfx5.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/jBjf7id/calgary_stampede_chuckwagon_races_on_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/jaeiajH/free_internet_nfl_games.pdfIn PDF document text
    • http://raisinshub.pro/jevobamoxovojedaksr7v4.pdfIn PDF document text
    • http://webcam-model.online/schwinn_airdyne_ad7_for_sale_canada4vftq.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/vexosafugunu/gepizeduralilararir.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/worksheet_3_kinematics_equations_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/banco_santander_brasil_sa_annual_report_2018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 5500 bytes
SHA-256: 9f7ac78fed171fedf6e379cea21c8df79b26ecad50ca8b482747a0d3701f8cd2
font_01_sfnt_off00010a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5A 10608 bytes
SHA-256: e3d1eeee20ce5da1653e75aa949ae1596cd613e22d0ca35b60a86726548f1856
font_02_sfnt_off00012ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE3 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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