Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d9cdd47c2347db…

MALICIOUS

PDF

76.8 KB Created: 2021-03-30 22:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8c7c8cfe2a6d533274d3140d5d6525cb SHA-1: d5dfd2f558ba85044fcd4e2716e2d9733f510900 SHA-256: e5d9cdd47c2347db0c371ae714924a6e308f63dd185ee7d91b6e72e766364fb4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDFs, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the PDF structure are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=how+to+unclog+coffee+machine PDF link annotation
    • https://zokemubolito.weebly.com/uploads/1/3/4/8/134895641/4752ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fc5f05e01043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373770/normal_5fccc198cbb33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_603e6fb8388ff.pdfIn PDF document text
    • http://teleporttur.ru/36626292871gbq8e.pdfIn PDF document text
    • http://opsnatur.fun/zekupagikasezka950.pdfIn PDF document text
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/fopukafavur.pdfIn PDF document text
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/nolodubipaxagipef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_601f032eb6349.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/tiduro/gigifesozotememu.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/pibadanojolurigulol.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/13734673158.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/how_to_write_a_narrative_essay_about_overcoming_challenges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90179665-d803-4f04-84f7-9c790dff2154/gmat_sentence_correction_questions_and_answers_with_explanation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b29da443-e3da-4d3d-8018-20bcaf2eb3f1/is_a_phd_worth_it_in_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd63f2a-6c5e-478a-bc6d-b3d670b43461/velaketofarajara.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/blends_digraphs_and_diphthongs_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/south_film_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/53824545621.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/us_history_timeline_major_events.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04db3163-a027-43c0-a756-59f88eb1914d/how_to_use_easy_touch_glucose_meter.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_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 5076 bytes
SHA-256: e21a83b57b69d32a5e973b78975139fd754b8571b8f1fbe3f1b36a61333a9946
font_01_sfnt_off0001012f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 10760 bytes
SHA-256: 036b468031a0acd5ef9564811576ee574f8d1483f1724eec0a02a91d8e8d8c01

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