Malicious PDF — malware analysis report

Static analysis result for SHA-256 2731461f8041aedc…

MALICIOUS

PDF

68.5 KB Created: 2021-03-07 01:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4f1cf189f4537d60bef550930a32011f SHA-1: 2a4baa595ee6bce1038840da8c416b0275df0b31 SHA-256: 2731461f8041aedc23c1740b7bf5a9f1345c5e8f9b32561ba235bdbc87ac72b1
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 0.9998

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://zajinet.ru/wix?keyword=declaration+for+mental+health+treatment+tennessee PDF link annotation
    • https://nogorixarolixi.weebly.com/uploads/1/3/0/7/130740589/1407193.pdfIn PDF document text
    • https://tezifotunojoke.weebly.com/uploads/1/3/0/7/130776805/duzidolafezowipijeg.pdfIn PDF document text
    • https://tagekoworiz.weebly.com/uploads/1/3/4/0/134016686/9705384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391009/normal_603101f3b15c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_6035f5ead2ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_603002fa5f2da.pdfIn PDF document text
    • https://witirasa.weebly.com/uploads/1/3/4/5/134525236/fudigik-xejinefuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_602a0a21629fb.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/94f429d7-ff17-4dee-a1ca-d99919fdd8bb/monogaraxamuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c582c87d-e21e-45e9-a959-b60fb5169c9e/what_are_munchkins_made_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c0931a-00c2-47fc-ad24-7c9f1a767338/48261398784.pdfIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_c619cfb7adb94b658fa63a0cd1714357.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6b0bf5-9b36-4564-9b84-a35246dc20b0/dewalt_20v_max_xr_hammer_drill_kit_brushless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8004102-bc17-4ca8-925d-80b0d98de455/33237829525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d5b450-afea-456c-ac73-8e9d5ef5b8fc/what_is_world_literature_subject.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_7aafe8b2dfd84ebe8700400a8b1be8d4.pdf?index=trueIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_803fb29eede04690bd117f0830be8fe4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6adfa8a7-01bf-4dff-9aa6-614cea431c86/28552899447.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_off0000d0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C9 5120 bytes
SHA-256: 16522f3dbc787e04c56d14a44af4c0ed22438ae9bf0d48a837a95ebb7ae93650
font_01_sfnt_off0000e210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE210 9944 bytes
SHA-256: 1411460d58bf7702e37f3c696961a6000436ee9c5ddd31851f48a8131077a19c

Open this report in the interactive analyzer, or submit your own file for analysis.