Malicious PDF — malware analysis report

Static analysis result for SHA-256 49acf72b0146097d…

MALICIOUS

PDF

75.1 KB Created: 2021-03-19 17:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d64b0970741dfd935339127bd029ac1 SHA-1: b9184b799fe2e136f1fda6a48b946ae63fc3fb9f SHA-256: 49acf72b0146097da71a987cf1779ffc1f68bd506934dc7777f23acff7eb206e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://botokaw.ru/wix?keyword=warlords+2+rise+of+demons+best+race PDF link annotation
    • http://biolinkus.me/infinity_war_stream_hdsw0sp.pdfIn PDF document text
    • http://shtampshop.ru/hp_elitedesk_800_g1_sff_i7_reviewf6274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5fd670b9ef82e.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/vefekipe.pdfIn PDF document text
    • https://vonekinorosasox.weebly.com/uploads/1/3/4/7/134732286/9285701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471106/normal_6022eb894a384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5fed52e64a7e4.pdfIn PDF document text
    • https://meluwirukumipi.weebly.com/uploads/1/3/1/4/131483006/nirepanujozed_rabas.pdfIn PDF document text
    • http://gerawat.22web.org/can_i_audible_books_to_kindle.pdfIn PDF document text
    • https://tajamopem.weebly.com/uploads/1/3/4/7/134745730/4208367.pdfIn PDF document text
    • https://kubamugikogili.weebly.com/uploads/1/3/4/5/134508843/puwojivaduf-palupuzoso-pimasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03271bdf-79ca-49f1-b453-3bed6e2eb5de/sunagoru.pdfIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_d51b40c99e914a098706199834ac5b24.pdf?index=trueIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_9091e48f976e45a58eb6a000153daf02.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fbc38b-6817-47f8-b1df-c784edd9c053/34168765795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fd12fa7-eb44-4b96-9989-1ba312932061/58932795300.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_af2b34fbb71a4084af53fdf3ff00b448.pdf?index=trueIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_2d93b76fcd954a52abebc3696f79a766.pdf?index=trueIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_e1c93791870b404695deae87fa94f471.pdf?index=trueIn PDF document text
    • http://mekavebij.epizy.com/anodising_process_on_aluminum.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE418 5452 bytes
SHA-256: d30c257fc3fc3b2ea423935cd320d1c8c053ebcf2c1bd9f39acf80f8cf29050d
font_01_sfnt_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 11300 bytes
SHA-256: ed8658045514885969f340b85472791e00d8c5b74d75cd2a9af455367d026130

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