Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf3e31068437334…

MALICIOUS

PDF

87.6 KB Created: 2021-05-20 18:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 49e892174ad50a527ed2f5984feb90b1 SHA-1: 8b1369ebd9f1c92ef8a3cef29aa76da767b5f077 SHA-256: dbf3e310684373341c07d25311b6c65507a1597250d73d0d3356fd7a14d309b1
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 0.9996

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 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://baarspo.ru/strik?utm_term=what+are+the+three+major+relational+dialectics PDF link annotation
    • https://totofogekof.weebly.com/uploads/1/3/5/3/135327731/47b39b92e4b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_604edd95a542c.pdfIn PDF document text
    • https://legorigerelok.weebly.com/uploads/1/3/6/0/136056749/rosujaborariva.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/0d58aa6.pdfIn PDF document text
    • https://jeletaru.weebly.com/uploads/1/3/5/3/135321400/5118573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_601d7c198fea6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/kidawosomatupotezazugo.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/rslogix_5000_plc_programming_software.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/best_sword_art_online_game_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/149fbdad-2673-4fde-8e12-5897cd10c450/71166371208.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/jugovited.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0eb8fa-faea-4667-b247-b03df5ebd65b/rolivilojiwubatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789d535e-10cb-456f-b0c0-8aac50d288ed/nowozowomomurak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e855193-f112-4bad-9611-e94ee01ce01b/bobiguvapanukud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b585c946-ca91-4c76-aa31-1a0ee9282876/lorex_eco4_960h_compatible_cameras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f30a540-019d-4d11-a013-d52aa89fe932/jean_paul_sartres_essay_existentialism_is_a_humanism.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/tft_garen_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a7d68c-8fb7-461b-9f1d-81bb9bb5290a/firas_alkhateeb_lost_islamic_history_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6221d30a-16c9-4ce3-a885-17f116f92774/tuxorexux.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/wiwudixumolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76f7004-b2bf-4f12-8ec9-52caf693500a/tasikalodenagafeximinap.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_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 5268 bytes
SHA-256: a6744bc9f34c4f36c6d105877e403f086ad2fd999976096d58712e46c8d02011
font_01_sfnt_off00012cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDC 10436 bytes
SHA-256: cf13b34b5da03cbefefb8dec60ea612ee51a750aa3f0cdf7f293d6dacd2873b1

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