Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f18d9ed72a3d33…

MALICIOUS

PDF

78.3 KB Created: 2021-03-20 08:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e5ae1dfca5f7071e47379d5655d17453 SHA-1: 9fdef8e9e1e5c5e35fbbc624e05f4cd0adf50234 SHA-256: 09f18d9ed72a3d33b14dc0cce9a4098efd8a53b328e00baabf44db2238adf352
186 Risk Score

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 0.9993

Heuristics 6

  • 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.
  • 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://pelibifir.ru/strik?utm_term=will+there+be+a+michael+vey+book+8 PDF link annotation
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/7505723.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/zozosudikapevosuked.pdfIn PDF document text
    • https://pixiguva.weebly.com/uploads/1/3/2/6/132681827/2542015.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/fjbgdsH/98430638606.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/X7jijax/road_trippin_podcast_video.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/are_monster_ultra_vegan.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/hXhdsii/wormax._io_2_online.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/basic_music_arrangement.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/ajdYjdj/best_app_to_make_videos_like_tiktok.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/how_to_put_paper_in_kyocera_printer.pdfIn PDF document text
    • https://sozazajigosana.weebly.com/uploads/1/3/0/7/130739782/jowukitiganiv_safutosanamoli_wusanumareged_jepuwe.pdfIn PDF document text
    • https://batusuxejodasav.weebly.com/uploads/1/3/1/8/131857782/227c45.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/tovafisegufibez.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/zigopotamesugavoxiw.pdfIn PDF document text
    • https://zulanamojo.weebly.com/uploads/1/3/1/0/131071117/futinoxumozefis.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/d3jathd/papa_pear_saga_como_conseguir_boosters.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/godoremitiwuja/bijufexijolavefabusolamot.pdfIn PDF document text
    • http://gixopiv.onlinewebshop.net/online_translate_german_to_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/67818237582.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_a379bb09635f49cc81e757169fd6219c.pdf?index=trueIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_bbdb4c38f5bd46b79bdf5371a00efc42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novifamigot/508512886.pdfIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_5d504afecb4b4ddca39c53fd54e82e4a.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 5432 bytes
SHA-256: 169c728d93ab48c2e2eac54119a04324d65292162e4e6afdb14089aaa33643d4
font_01_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 11324 bytes
SHA-256: b28e0d1183cd9f1b8bb23edfd9e6959ad95aa79409c9328c34de91f2d4751bde