Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b95ab7d32d5d9f…

MALICIOUS

PDF

80.0 KB Created: 2021-03-17 20:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 01a4a716c2fcd75d4fdc5ba93003adff SHA-1: 9a2143cadbdf5d5e820602efed7376342245a7df SHA-256: 63b95ab7d32d5d9f82bbfba5da89fb93a3dddb8d21998c4ba87a7252698eccb7
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://maypoin.ru/strik?utm_term=can+you+play+diablo+2+on+ps4 PDF link annotation
    • http://simkosa.website/363319533521i33r.pdfIn PDF document text
    • https://cdn.sqhk.co/dosojegomugu/zHZiamP/64249081426.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/tezojukafime.pdfIn PDF document text
    • https://xavamukunakupa.weebly.com/uploads/1/3/1/4/131437969/54cc8a68ff2.pdfIn PDF document text
    • https://xatiletovolut.weebly.com/uploads/1/3/1/4/131409128/takunok.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/zumusetazewomapub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_6021a46f16cf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365635/normal_5fc9ea8ca9813.pdfIn PDF document text
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/4473670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_604da6b7dfa0d.pdfIn PDF document text
    • http://winclean-shop.space/kugojovexogokutapejukafgeoya.pdfIn PDF document text
    • http://storeyou.store/17293122100e0iul.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/095721e4-b650-4b94-aa4f-4e859284ca2a/2013_jeep_grand_cherokee_overland_daytime_running_lights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246a04a2-a1bb-4367-8236-4c2f8009d6df/31716761529.pdfIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_e77684b1ba4f4aa5a05647429e023d17.pdf?index=trueIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_70c2ae64198241d094114db1e3105c57.pdf?index=trueIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_b885651389f94aabb6a155bfdaeb30f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b919b7-37bb-41a5-b33c-ad6acd557703/netgear_wndr3700_firmware_tftp.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_248c40a191db453e91bcc162c0bc0144.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0affdbc-44e3-4b79-8187-150f70e1876c/fogexabilosojapikomafu.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_568c9d1e8b7e49f08245defffbe2023c.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_off0000f947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF947 5224 bytes
SHA-256: 5b18cb037e7b27a68faf31dd827fb7eec3505935e520a66a93399c4f977b76e5
font_01_sfnt_off00010b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B24 11172 bytes
SHA-256: ae7cf1135f4f71eda263051d86cd3be3faed27b4bdceedab33c4cab3fe6ea55f

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