Malicious PDF — malware analysis report

Static analysis result for SHA-256 e859e4f62bb0de05…

MALICIOUS

PDF

173.9 KB Created: 2021-04-07 20:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dd7998f3cdf64144707290299307cf82 SHA-1: 107c7949fd33f9cd436040751794c0e924851169 SHA-256: e859e4f62bb0de052191ec6cc2d1b6699b9dba6baafa9431ebd5a82ed29e5ee8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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://zajinet.ru/123?utm_term=coroplast+837x+datasheet PDF link annotation
    • http://bunagutafa.getenjoyment.net/applied_qualitative_research_design_a_total_quality_framework_approach.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/gjDhaie/98981495437.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/ekhgiSZ/paint_by_numbers_online.pdfIn PDF document text
    • http://tagaporigowekis.mygamesonline.org/flat_stanley_book_set.pdfIn PDF document text
    • https://cdn.sqhk.co/pujimuxuja/GKhage0/talking_monkey_app_this_is_40.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/5ighggi/gun_shooting_sound_effect_ringtone.pdfIn PDF document text
    • http://fagixadako.iblogger.org/fuvosokelifibezorumimo.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/a9c18b86-5ebb-4f4d-916c-8b9799f237ba/83707193504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0534a33-6b16-4a72-83f6-353ad049583c/is_ssr_good_for_stocks.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_8fd55bf802ae46379c94846038f69374.pdf?index=trueIn PDF document text
    • http://jozazumuluvos.epizy.com/lokumarabetobebelijubu.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_64ae54230c78461fb25a422e031e2421.pdf?index=trueIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_279e03251c4144ce91ccc377493cc1cf.pdf?index=trueIn PDF document text
    • http://bebojivim.myartsonline.com/fizukowaxewifules.pdfIn PDF document text
    • http://wowinagapujepok.epizy.com/27200666771.pdfIn PDF document text
    • http://regigaxuwejizu.epizy.com/bartaman_patrika_today_bengali_download.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_500936967d524cb7b7978badd85e891f.pdf?index=trueIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_2fd6f7d038564967afebbceb055631b7.pdf?index=trueIn PDF document text
    • http://puretuwedeva.epizy.com/interesting_persuasive_speech_topics.pdfIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_75521bbbc3a644b4a4c76aa538dcd52b.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_110c1253b12b4b9d9e6c4222c57bec2f.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_off00026b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B14 5460 bytes
SHA-256: 420d52bcb7c4484d99dbacefaae7f661370257b7eedc1727bf1cd14800f55ccb
font_01_sfnt_off00027d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27D99 13216 bytes
SHA-256: cce7ddecb88929e8cdc9dfbe300e1a727ef6757edfcc8203f820478f0c7e6b82

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