Malicious PDF — malware analysis report

Static analysis result for SHA-256 115024cb0a6ecc49…

MALICIOUS

PDF

93.8 KB Created: 2021-03-18 04:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ed60065c7b916ad99eddedd8afedeabe SHA-1: 4d10ac44ffdd313bdad0622ef5523ea79531f835 SHA-256: 115024cb0a6ecc49cd327a32c1dae22ed4e13ac0ce56695ce54828b9cb20c84d
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, hosting numerous PDFs on disposable domains, likely to distribute malware or facilitate phishing. The presence of external URIs and a 'download button' heuristic suggests a lure to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/123?utm_term=hd+banner+background+pictures PDF link annotation
    • https://cdn.sqhk.co/mifigatira/pRgcski/pokemon_sky_warrior_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/j8ji4jd/golf_battle_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/0zjbiiJ/16038400059.pdfIn PDF document text
    • http://nujokopinud.iblogger.org/jusipejomogom.pdfIn PDF document text
    • https://dujulofenali.weebly.com/uploads/1/3/4/5/134587776/kibujuluvevefe.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/gehcGje/best_pickup_truck_to_buy_uk.pdfIn PDF document text
    • http://azakalaza5.xyz/40786667384bjo08.pdfIn PDF document text
    • https://kupafejesuxab.weebly.com/uploads/1/3/4/6/134650707/18b87.pdfIn PDF document text
    • http://vivuwolijerina.iblogger.org/74332915001.pdfIn PDF document text
    • http://timelessdecorum.com/arlequim_servidor_de_dois_amost433o.pdfIn PDF document text
    • http://itverys.space/jedupekakizoputoniwivumenjboy.pdfIn PDF document text
    • http://copyrightshelpscenters.com/sometimes_you_die_downloading53tor.pdfIn PDF document text
    • http://chatik85939775.fun/how_to_set_rings_on_panasonic_phonemk0gs.pdfIn PDF document text
    • https://fulidozemupure.weebly.com/uploads/1/3/1/3/131384797/kuvukiwag.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
    • https://uploads.strikinglycdn.com/files/d5f078bd-6814-4af2-8627-714920659af9/62525938450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/febd6543-60c5-4151-8230-de2dc97244a6/kenmore_elite_he3_washer_parts_diagram.pdfIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_3c333b45bd7a48cebff946e786932759.pdf?index=trueIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_792620d2ff13451d9aea2d5914231787.pdf?index=trueIn PDF document text
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_544417037dbf4353824aa1bc8f1343b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b811907d-f831-4728-bf78-db789eddfa66/19942514166.pdfIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_aef3da9852a8465aa7716422aceb8200.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25dc5179-3fb2-4da9-aef3-1f6992f2adda/used_peugeot_103_moped_for_sale.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_fc0cf3870d324de6b30fcfb15aabd5cc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12051 5256 bytes
SHA-256: 74ca3ae31b181235519c7dcf10cc9181c175992ef807dfe3f0c1ea0ed2f27ca6
font_01_sfnt_off0001323b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323B 12072 bytes
SHA-256: 66fa6125e72150427589e0c0f62b9771f72a70fdd34aca317040232c8de3d3bd
font_02_sfnt_off00015b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B6E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230