Malicious PDF — malware analysis report

Static analysis result for SHA-256 1383056c98da5b20…

MALICIOUS

PDF

86.4 KB Created: 2021-04-03 15:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5df231aedc170ca20885176a693caf92 SHA-1: 121a8069d88dadcbd3656eab38ab556543e0a6dc SHA-256: 1383056c98da5b2050a5348a44faff1f0c33d53cccf12e998e1eb5c4d3b7d2cd
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=the+testing+summary PDF link annotation
    • https://cdn.sqhk.co/wadelovelo/Boigsic/easily_influenced_thesaurus.pdfIn PDF document text
    • http://moshon.space/62264099914f00px.pdfIn PDF document text
    • https://cdn.sqhk.co/nidaruzada/gha2iiM/create_mobile_app_from_google_sheets.pdfIn PDF document text
    • http://timelessdecorum.com/bogesojonenavuxunitafanairjyf.pdfIn PDF document text
    • http://sayfelengs.space/87777870371dp1ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393639/normal_5ff76c88a9bbd.pdfIn PDF document text
    • https://cdn.sqhk.co/denugesugumu/YTJcUjO/instagram_search_history.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/iiajdjj/butovavalekotutiximavi.pdfIn PDF document text
    • http://klokisik.space/fobodaxosafadanugatunuk7t37o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493569/normal_6028199867c94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_5fd382e61f173.pdfIn PDF document text
    • https://cdn.sqhk.co/sixatowitur/YrhihbW/tribal_wars_mundo_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_60388b3530abc.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/what_happens_at_the_end_of_if_i_stay_bookwtodx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c8950d67-399a-481f-b0b6-a8ad167c1dc3/wabopajogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226585bc-4669-4b2a-bfee-9ce5f82915fe/nokenuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae3bbae-b944-4fe2-a57d-45bc84eedb9f/nekawox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86298ce8-35c1-48a5-95b6-be34ea5b14ee/kiwuvipewudefezuwam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e27a1056-2c3e-40ae-ab3e-bf64b3c648a6/juwoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d41b693-7e3f-44e3-9a79-d1e4afadebeb/79687365178.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C24 4888 bytes
SHA-256: f222479681386c3ecf39a8ced8b304bc3f84bfc9779fe8d20d5352cc408fab9d
font_01_sfnt_off00011c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C86 10140 bytes
SHA-256: 191e321ef1fc35bc2101442fcd7aaa1c1f9693a7401bafb6905a76c94b72183d
font_02_sfnt_off00013eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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