Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea57b17b6ed31f9d…

MALICIOUS

PDF

78.5 KB Created: 2021-03-11 07:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e9883604a51a80d60aee33c0b28c9729 SHA-1: d0ea2d85817c7ace003fcbb467a06336bd88c1e7 SHA-256: ea57b17b6ed31f9d9f8dcdacb22af496557eb3651d2b571b89fe391e11c72170
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 0.9964

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://mezovuduw.ru/wix?keyword=human+migration+map+national+geographic PDF link annotation
    • https://cdn.sqhk.co/vasozaponem/cQigGkX/jotobupososu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368772/normal_5fe2caf9bf4c8.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/jjjVia7/uefa_champions_league_2019_20_groups.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/hQhvjfo/lumuvanukinefonavorotina.pdfIn PDF document text
    • https://cdn.sqhk.co/nelufebo/hjeidgh/fuxikujo.pdfIn PDF document text
    • https://fepobewute.weebly.com/uploads/1/3/5/3/135386667/7273469.pdfIn PDF document text
    • https://xavimunemu.weebly.com/uploads/1/3/2/8/132815343/wuneziwukukesot.pdfIn PDF document text
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/797303f89c62e3.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/izvEhgS/modern_sniper_combat_apk_unlimited_money_and_gold.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_601a9c490f8b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488810/normal_6043025838a33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390371/normal_5feb64e11d93f.pdfIn PDF document text
    • https://sosatiga.weebly.com/uploads/1/3/1/1/131164398/e7253d4c.pdfIn PDF document text
    • https://tetemubegogik.weebly.com/uploads/1/3/4/4/134443084/3790172.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_a877943b3c454840b4c4d094ce2f229e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa02453-6155-458a-945c-21e968ff67e6/project_management_in_practice_fifth_edition.pdfIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_bc1078d920594ffc8fc3f1d5ff106e37.pdf?index=trueIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_800f3fddfa0144f89eb1235e3b7a3478.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0108b58-69c9-47e6-be08-cf004e5298e8/zasesafoxugumuxiboresoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b900c4b-537d-4586-86ed-896181860260/the_mountain_road_film_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd709f2-c901-441a-8ce3-c583d05fcdad/prayers_for_my_future_husband_free_download.pdfIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_d2ac411f45b04f14ba03eb0c3af5d700.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52dd24df-cf6b-40e4-800e-b995c8cef94a/why_my_refrigerator_is_not_dispensing_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1da3b4-92ed-41e8-9cd5-19b20010ce11/36707013720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea2129f-706d-4672-a66b-29111ffb6fc1/gifekupozeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7feb803b-b6e3-4f7f-9c17-789761112bdc/dujumube.pdfIn PDF document text
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_3a48826f5bc54b2ea066047cafe44516.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_off0000f80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 5132 bytes
SHA-256: 31c7d493d479881f3a2f6e12024101e96dbb319ae3e7315a4915f99ca5e360d3
font_01_sfnt_off0001094f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094F 10240 bytes
SHA-256: 8bc22dc99c8d9d01671238d23dd5a19e83476a64637ffb7b62fca7d91874f29f

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