Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9748215ff15b087…

MALICIOUS

PDF

81.0 KB Created: 2021-05-01 17:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1dd82e9b42c8ce75049e3d59302d95c3 SHA-1: 2309fe5e942cd44228ee3b4546905e8d0883a2d5 SHA-256: d9748215ff15b087f7dd7c7de5df9de5beaa35e7023a819bd4f3fc26b71289d9
156 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 0.9995

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 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.
  • 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://jacksth.ru/strik?utm_term=how+to+use+amazon+dot+echo PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386829/normal_60074ae9a9a17.pdfIn PDF document text
    • http://vopibuxipem.22web.org/petutibe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474192/normal_5ff5b14ba2155.pdfIn PDF document text
    • http://setovewurepenu.22web.org/xalekev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461511/normal_5ff7b901aaae8.pdfIn PDF document text
    • http://intereriia.com/best_recovery_tool_for_androidggeac.pdfIn PDF document text
    • http://vezerfa.xyz/wiravo22rwp.pdfIn PDF document text
    • http://copyrightsupport-ig.com/gba_emulator_ios_12._22rcpt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_6021b9e754818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fc86ce0c23a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491669/normal_6003b7491c10e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_60184353bfb25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487386/normal_6024404e686fd.pdfIn PDF document text
    • http://rusakova.space/drifting_warszawa_prezent9e4gy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_603b52feb83f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445340/normal_6031ecaf0bcc2.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://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_54f139cef94746619007d8d5d8801810.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_269543e74e9a4205bd45c6173a0218ab.pdf?index=trueIn PDF document text
    • http://pikididubemet.epizy.com/coleman_roadtrip_285_portable_stand-up_propane_grill_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604e8f73-84fa-40f3-85fd-7feae117c562/bose_lifestyle_48_price_in_oman.pdfIn PDF document text
    • http://sovizaz.epizy.com/a_plague_tale_innocence_collectibles_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e4bf08-655a-455e-a891-dc30f970d0bb/what_is_a_womans_role_in_the_bible.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_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 4988 bytes
SHA-256: dd326b1b0afdbd39c663f40fc4371a0d8f09ed5feb81b78863ad063fd0c70f9e
font_01_sfnt_off000102f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 10836 bytes
SHA-256: 3f02ad79ce585c9c59812d3c61c2e01ac47274170da5f784b5883769944bc608
font_02_sfnt_off00012822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12822 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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