Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab38ab76e75203de…

MALICIOUS

PDF

151.4 KB Created: 2021-06-07 15:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 090872429afa0507640829bd137b24ef SHA-1: e3dc9452eda3d48bea5add28e8ca30b4d171e491 SHA-256: ab38ab76e75203dedf17cd5c789e485503803039fee310490a00908c6b53e273
126 Risk Score

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 0.9991

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 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://oniceh.ru/pbw?utm_term=which+of+the+following+are+things+that+adversaries+want+to+know+select+all+that+apply+quizlet PDF link annotation
    • https://sesoramin.weebly.com/uploads/1/3/2/6/132681885/ximedetor-wilokere.pdfIn PDF document text
    • https://faremuxonebaw.weebly.com/uploads/1/3/4/5/134598019/gobosexejo-pitesapipezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_6059bff460ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_606618aa0579a.pdfIn PDF document text
    • https://boginajidu.weebly.com/uploads/1/3/4/6/134693166/niworogupuzajan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_605b8d94afc04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_60b90b4a7dae7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427501/normal_5ff09dd31d42e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486206/normal_6020ad866805b.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/6726514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477387/normal_6055737f7af0f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4427080/normal_60afe49d25b62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_603eb0a38ce38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_603f557b190e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuvovazuvezo.pbworks.com/w/file/fetch/144656931/christmas_lunch_invitation_email_template.pdfIn PDF document text
    • http://zolunegoli.pbworks.com/w/file/fetch/144563460/bapilidulelulazenofakeze.pdfIn PDF document text
    • http://kibumezi.pbworks.com/f/3294926849.pdfIn PDF document text
    • http://tosuvop.pbworks.com/w/file/fetch/144752346/fairy_tail_magic_brawl_celestial.pdfIn PDF document text
    • http://vosebim.pbworks.com/w/file/fetch/144579750/78390310928.pdfIn PDF document text
    • http://lokifasowaso.pbworks.com/f/download_sims_4_city_living.pdfIn PDF document text
    • http://xegosigex.pbworks.com/w/file/fetch/144754989/my_friend_dahmer_nombre_en_espaol.pdfIn PDF document text
    • http://bezagodo.pbworks.com/f/does_netflix_work_on_ios_9.3.5.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144720462/mikavimobuzuzo.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/fleischner_society_guidelines_for_pulmonary_nodules.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_off0002130e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2130E 5924 bytes
SHA-256: 12a59de745541e34db18a19d6f3e7de1e1301e3d1e900b4f966cba27c666e72c
font_01_sfnt_off0002275a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2275A 11112 bytes
SHA-256: 2ed6d8dc5852fc9dd9ad19e5180ea4cbaea7cfbe9f1e4484f2984927e69a902f