Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f6315069f1bb3d…

MALICIOUS

PDF

81.6 KB Created: 2021-02-15 08:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1ae9a6338371a0bec8d37b06d2864696 SHA-1: b9eea983c4057ed1cf980330eff472c02e1d4a00 SHA-256: e9f6315069f1bb3dcaeaf8925851c71a40aea89ef34cf9763cb72ab32cb1fd4a
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 0.9998

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://druttle.ru/aws?utm_term=printable+bi+weekly+budget+sheets PDF link annotation
    • http://robot3.site/gold_plated_jump_ringsc93kc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474205/normal_601dadf0c2dad.pdfIn PDF document text
    • http://ryukzak.digital/angry_birds_pc_game_apunkagameswz3rk.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/zemilawofu_mujatelar.pdfIn PDF document text
    • http://hookup157.site/304358860717868e.pdfIn PDF document text
    • http://supsun-aero.com/for_game_loop7wkzt.pdfIn PDF document text
    • https://goguribepolim.weebly.com/uploads/1/3/0/7/130739596/bamaxa.pdfIn PDF document text
    • http://gonakasuzoze.22web.org/good_morning_photos_app.pdfIn PDF document text
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/6894767.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5ff4c20da0fc2.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/ff3c0a2441.pdfIn PDF document text
    • https://kifezitiwiwafu.weebly.com/uploads/1/3/5/4/135400929/7874f3e291.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaziwovapotulit.epizy.com/guxowokisosaz.pdfIn PDF document text
    • http://gapitufukiwiti.epizy.com/rizikaxapu.pdfIn PDF document text
    • http://fujifumava.epizy.com/chamberlain_garage_door_owners_manual.pdfIn PDF document text
    • http://pazovegisot.epizy.com/rinadajil.pdfIn PDF document text
    • http://jivemewogipalen.rf.gd/pdf_to_word_convertor.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_off0001006e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 5484 bytes
SHA-256: 2b263cee4df24e00d7f9c042c259707ff3dfe6c9b21475f56a2b7805070d1071
font_01_sfnt_off0001131f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131F 11248 bytes
SHA-256: 543b598b7999c3b6e8043f1aa54b11e049c8c0624c6000cf60e720fe69f9499a