Malicious PDF — malware analysis report

Static analysis result for SHA-256 99320b10c68e8ebf…

MALICIOUS

PDF

117.7 KB Created: 2021-03-11 05:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 362ff4e9b1a826cc0fa728d2e249dbda SHA-1: 59af3979a3d2e94e8753dec5b3aebeac81d0f883 SHA-256: 99320b10c68e8ebfbdeebf39204ceaab0c4cdfa9283f4956919c0ab3114ac748
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://druttle.ru/strik?utm_term=costco+magic+bullet+blender+reviews PDF link annotation
    • http://storergoods.site/venn_diagram_3_circlesu96rj.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/migiv.pdfIn PDF document text
    • http://momarivido.mypressonline.com/23690126303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373526/normal_600332cb33773.pdfIn PDF document text
    • http://busforpay.online/35076529637ma7vv.pdfIn PDF document text
    • http://reduslim-official.website/trinetram_video_songs_hdiheam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_6045c69db26ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404488/normal_604985c0a06c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_603603ba887f3.pdfIn PDF document text
    • http://sberpodarok2020.online/calculating_ph_from_molarity_worksheetq4mm3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419822/normal_60362affcddf4.pdfIn PDF document text
    • http://marinarus.space/jartex_network_reportjfqgy.pdfIn PDF document text
    • http://ekzo-fruit.ru/jepinovixuvikogepidomxp5.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/13078367572.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/c4259adf-b419-489c-b741-40136859840b/megajowuxarap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3beccaa3-7713-4b3a-b1e4-5d686a5816d0/gafetuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d694c4d6-09ee-45fa-8570-fe212a7aa92e/wazanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e2f2ace-f62c-4c9a-8a4b-75eaaac5e97e/tagizeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff281738-55ff-4e35-9097-2f1f81ceced8/xudaxebowutemaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e928634c-b194-4932-a338-c453714f4c28/delta_shopmaster_scroll_saw_ss200_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0aac27-b187-41a7-bbbb-19b5b7937dd1/63532251734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e8a2f6-7abc-40b5-8eb4-48389f4ebfae/the_challenge_war_of_the_worlds_2_reunion_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd12043-a80a-446e-b46b-aabd3e0d7f04/34194093378.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_off00018e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E63 5456 bytes
SHA-256: 7ece0a7390e3ee5e26a22d58089737a07850d3ec972c6a6e5be2a07b35c44267
font_01_sfnt_off0001a0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0E3 12164 bytes
SHA-256: d2df4d8407f960515e62c5b64dad0d7f4cbd8d58a820ace78319741172737a04

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