Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9dd9ddeb2796863…

MALICIOUS

PDF

72.3 KB Created: 2021-06-09 06:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 40518fa988aa33fbbed59f0e08f8ea79 SHA-1: 84ff50f5a0ccc311d5754beefce9d5888bcb97b9 SHA-256: d9dd9ddeb27968638b1ed41bbe3c263aec9adf09ee324eb8edf0dd78c0f9dbff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/pbw?utm_term=addition+reaction+examples PDF link annotation
    • https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/165dd0.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4480880/normal_60b2731813ac4.pdfIn PDF document text
    • https://tevufipe.weebly.com/uploads/1/3/1/6/131606546/sifabojotijezese.pdfIn PDF document text
    • https://wenakewijota.weebly.com/uploads/1/3/4/6/134611788/122b4a8c9e775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479933/normal_6067f826772f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482858/normal_6016d30d596dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380525/normal_5ff1510198dfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_6039f77949799.pdfIn PDF document text
    • https://komavumi.weebly.com/uploads/1/3/0/7/130738531/doguseluwosiw.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/zusuvanorepegu-laguwerega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446158/normal_602afabc4944b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470232/normal_601e4d83cbcf9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://numefen.pbworks.com/w/file/fetch/144536382/yoga_asanas_with_pictures_and_names_in_tamil.pdfIn PDF document text
    • http://piwomimagito.pbworks.com/w/file/fetch/144841482/what_is_the_purpose_of_project_appraisal.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/39403564482.pdfIn PDF document text
    • http://dewubuk.pbworks.com/w/file/fetch/144656820/36664630031.pdfIn PDF document text
    • http://morabef.pbworks.com/w/file/fetch/144588978/79389337968.pdfIn PDF document text
    • http://lodedeti.pbworks.com/f/stick_shadow_fighter_mod_apk.pdfIn PDF document text
    • http://jejosuxiz.pbworks.com/f/hsc_board_english_question_paper_2019_download.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_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 5276 bytes
SHA-256: d2d1ad3b4dbd07e50d4e749f8bdc86257fa737136d386f594746741143609d2f
font_01_sfnt_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 10592 bytes
SHA-256: f522d0c7a821623aaa5302d2c318b4b00221687989d1acd2ca3e8990bb410e45

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