Malicious PDF — malware analysis report

Static analysis result for SHA-256 4792fef3eac9fe43…

MALICIOUS

PDF

75.3 KB Created: 2021-03-16 00:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ce734b51019046e14f53159d01f11a87 SHA-1: e9e64096361cce9da78e9f0a7f11756acdd6e739 SHA-256: 4792fef3eac9fe43f8c55dec93ac05b071a021b831470e4bf2991ba6f3d14445
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 0.9997

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 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://bologen.ru/wix?keyword=download+your+freedom+premium+apk PDF link annotation
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/3826456.pdfIn PDF document text
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/7566223.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/xejiruwovijir_fuwesur_mezigaf_tugedoke.pdfIn PDF document text
    • http://rovovijezigapo.22web.org/28342747337.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/vuxirefare/dunakekimipabozagivulobun.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/csr_interview_question_and_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/holmes_air_purifier_tower_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/96516387566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd6d44e-7192-4e0d-8072-a6ae80ac53d1/94602207597.pdfIn PDF document text
    • http://patigol.rf.gd/rijajatuvagisibukog.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/sebopilexi.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/bella_lullaby_piano_music.pdfIn PDF document text
    • http://fixuzobimube.epizy.com/arbeitnehmerberlassungsgesetz_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a040f5-75ac-4cc0-b8e5-49f76e78dd83/80292106720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec0c7aa4-18df-4a4f-9c76-fa349693906b/miracle_morning_savers.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/86533203108.pdfIn PDF document text
    • http://xekinawofer.epizy.com/force_guided_relay_contacts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0f0b74-3ecf-4220-9377-c99d0c3b7ded/nancy_drew_like_games_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63273ea7-30db-404b-8549-586220b4546a/13626830386.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/biceps_workout_with_dumbbells.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d443b5-c06f-43f0-bbbf-28bd0352f7b9/tekize.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_off0000e383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 5268 bytes
SHA-256: 1f0d577bb01ab10354952b1a20ac2fb338632c08bb25f1b5f36d26d24a637ccb
font_01_sfnt_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 14392 bytes
SHA-256: 477a9615abdc254b67b295abcee52ba47afc9879f9950f8bdcfc11f0005696c2

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