Malicious PDF — malware analysis report

Static analysis result for SHA-256 5504587db7b3f524…

MALICIOUS

PDF

77.7 KB Created: 2020-11-17 10:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 45fb69cdc3bc4cde0e1dd17756d49f2e SHA-1: 2c82bdc281db90b5b0758473147a929152196a36 SHA-256: 5504587db7b3f524a8b03dabf89f36de0e1a02bcdb480c65fb4ab141491f9ee7
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded links, suggesting a link farm or phishing attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the critical detection of a malicious redirector indicate the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/123?utm_term=a+bright+room+called+day+play+pdf In PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/b2608e.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/aaad314111caf.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/lanezo_xusuxuguwikati_raroviz.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/e77048f31d9a457.pdfIn PDF document text
    • https://pupiwikupexi.weebly.com/uploads/1/3/4/3/134348736/fuxilupagovu-vekatebumu-joxix-domajebejuzis.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/3057652.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/vevujute-dodemirazu-porilaf-gusovimavibik.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/gewisetug/3856871362.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/topic_for_english_class_discussion.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/8th_math_unit_3_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/56997972283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44805fad-b5a0-4289-8c82-018f19a93067/diziler_km_sorular_ve_zmleri.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/fitirapiwemovivewijagak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af10fe30-a30c-46cd-a9b9-207418e8fc88/61994691033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5a5852-5991-41a5-82b1-3343a19ca458/the_year_of_billy_miller_read_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/monster_hunter_generations_ultimate_bow_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45cab40f-d444-4397-9569-08e3bd29d239/elmwood_evangelical_free_church.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_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 5624 bytes
SHA-256: 04adf4845ba318aaf374d5a6c09475c6df47b474d09f206cca6748634f3b5631
font_01_sfnt_off00010603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10603 10544 bytes
SHA-256: a169935261e461d9215cfc6b77227dfae9854af71f386cb394e9678cebbabf1f

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