Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f9a4e1281b23fe…

MALICIOUS

PDF

98.5 KB Created: 2021-02-21 21:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9207f48a1554fb2061243d9c36843624 SHA-1: d1103c5e5058d5d355c4e9574d8c4736654e1786 SHA-256: 02f9a4e1281b23fec57353bcdc937d8e85b24981984c4f860d4d83fef38e3977
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://maypoin.ru/wix?keyword=chapter+8+worksheet+pe PDF link annotation
    • http://uuuuull.space/117861852855b3ny.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/Wgf81jj/blood_pressure_medications.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/bjbhaKR/take_lessons_live_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449616/normal_5fc7d2cc93fd7.pdfIn PDF document text
    • https://gitakitopawal.weebly.com/uploads/1/3/5/3/135325500/zamarovewesuj.pdfIn PDF document text
    • http://dfwshootersupply.com/sony_a6500_manuallx9ue.pdfIn PDF document text
    • https://cdn.sqhk.co/dumudegurit/hiGiajf/just_dance_controller_ps4_review.pdfIn PDF document text
    • https://nupewaxupojiga.weebly.com/uploads/1/3/4/0/134042887/bajejejar-kirebuveral-venerilov.pdfIn PDF document text
    • https://wizugelavuri.weebly.com/uploads/1/3/5/3/135325487/konaribi_tizuxojo_bobos_suzozagomip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416332/normal_5ffe51b16c1db.pdfIn PDF document text
    • http://makeyourself.xyz/fusagusifobonugado8v0s5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384831/normal_5fdc4293e7dc8.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/zibudefakatuxov.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/kipuwalerodixalon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459641/normal_5ff6adf024671.pdfIn PDF document text
    • http://ferejupaxebul.iblogger.org/open_cell_backer_rod_data_sheet.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
    • http://selifesupenikiv.epizy.com/3395882169.pdfIn PDF document text
    • http://sagajifigekar.rf.gd/andante_sheet_music_piano.pdfIn PDF document text
    • http://xuzatazuji.epizy.com/silhouette_cameo_3_software.pdfIn PDF document text
    • http://roronusosewurul.epizy.com/best_front_load_washer_consumer_reports_2019.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 1716 bytes
SHA-256: e2d8f8e7bf3217d5af50051aa1cde5769d8c062680d6ef7b9d05175b80867e39
font_01_sfnt_off0001075d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075D 3092 bytes
SHA-256: 4a0887ba2138b4bfbc7420cc97cce501ae5ff43089cc80a9ff79f1cd792e76ee
font_02_sfnt_off00011259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11259 4884 bytes
SHA-256: dbf7986b43a4a2edeea5090877029c675b563dfd159c97781d504d6ec29916ce
font_03_sfnt_off00012312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12312 16116 bytes
SHA-256: 62161c1e4e118d04af085eb851549ec23f18f4cd5f35fd00e6de8d7cc03687b2
font_04_sfnt_off000154de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154DE 16444 bytes
SHA-256: 0f68059c87e3f69698dfb63a6f2d48904d21e7afe4b43a5260ecc939a3eaf854
font_05_sfnt_off00016b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B3A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3