Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0487218f10b40df…

MALICIOUS

PDF

151.2 KB Created: 2021-05-14 06:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 192e7e5127b7a218dc61ec1be2b55e88 SHA-1: a8cceb3117817ce4be7fb386f2e232e7269dde87 SHA-256: f0487218f10b40dff9593c9067247f50773d953f680e85f59f906c03fe7360e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many pointing to disposable hosting or link farms, indicating a likely phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the suspicious nature of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://xezojetit.ru/strik?utm_term=the+banking+concept+of+education+paulo+freire+summary PDF link annotation
    • https://rejileju.weebly.com/uploads/1/3/4/3/134335231/sodekununopumokik.pdfIn PDF document text
    • https://kirejoji.weebly.com/uploads/1/3/1/4/131483098/59f387e0.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/ad6309751531a.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/ijCSaEJ/life_simulator_2019_mod_apk.pdfIn PDF document text
    • https://zekulereloto.weebly.com/uploads/1/3/2/7/132710655/dodokalaw.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/4993908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462339/normal_606d6bbd4681c.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/Rjejegd/pancake_milkshake_game_android.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/7421686.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/KjdJThc/key_messages_synonym.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/PjfkqlH/puraganetivifosepuzidipu.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/HgilUlY/chemistry_book_online_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikifefisu/hh1ibBd/pafosatazemotiniju.pdfIn PDF document text
    • https://wabibazo.weebly.com/uploads/1/3/5/2/135295983/ef9f4770b.pdfIn PDF document text
    • https://kipejuxi.weebly.com/uploads/1/3/2/6/132682137/2823893.pdfIn PDF document text
    • https://fotofewoxa.weebly.com/uploads/1/3/4/8/134849098/fdc0fc02e33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_600ce23bd11c2.pdfIn PDF document text
    • https://cdn.sqhk.co/dakubakasilu/erogfjf/ball_rush_game.pdfIn PDF document text
    • http://zuviwadakaji.22web.org/34229168556.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/atHanTF/91546511743.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/hcvjhPC/92918569577.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/KhbVja7/nixekeluzebanegixufu.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
    • http://zatopava.epizy.com/how_to_start_a_formal_response_letter.pdfIn PDF document text
    • http://monuwuwotivonil.epizy.com/52055587983.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_off000206f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x206F6 5704 bytes
SHA-256: ba9f2656e84fbf086894f00a9a16cc07d28095acf06794431c61ff59dd0155d5
font_01_sfnt_off00021a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A29 10636 bytes
SHA-256: 65b36dd3b046b4fcc7cbb125c5130b14046877a3ed4c65f9baa2d53f448bbfd8
font_02_sfnt_off00023e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E4F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f