Malicious PDF — malware analysis report

Static analysis result for SHA-256 63272cfbb946a8dd…

MALICIOUS

PDF

92.6 KB Created: 2021-03-17 23:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0030677e21c5b4886fe9a9378515568c SHA-1: 55088f3d11dc8953c0d4f340bf4f9353dc91ca1c SHA-256: 63272cfbb946a8dd11176f78646d0dcd850fc0004a32f1d8348d639d5d135dfa
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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.
  • 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://soxebez.ru/wix?keyword=math+124+msu+grades PDF link annotation
    • http://mivolamuzimapu.22web.org/482278269.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f997962-3c69-4e13-bfc5-00633de47e80/the_magicians_season_5_episode_9_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7e20316-c501-482f-b1c6-9e4123320f4f/88710979853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f5b7178-feb9-4ef2-ad71-9a8c4da3a792/48536014379.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/balam_pichkari_video_song_tinyjuke.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_b836061ebe014f00a3ad0ccb58ea303d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safago/kenmore_water_softener_parts_list.pdfIn PDF document text
    • http://bedekopezedegej.rf.gd/31416552297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b806480-95da-44ff-97a6-c98d5bb8298d/jamman_stereo_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/codepen_html_css_templates.pdfIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_aca3c6018d304a02aeae68dfaca892b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/dd_3.5_dungeon_masters_guide_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2db74c-1728-4fe6-837d-4cb74f46fb7a/samsung_un65ju6700fxza_manual.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_5f7d1561d8f74f91b1b2044b19bfec9d.pdf?index=trueIn PDF document text
    • http://zuxulabawiba.rf.gd/as_a_man_thinketh_in_his_heart_nkjv.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_c5e962ea199a416bba091addfa17f75c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/749d5755-5afb-4164-a2f8-8fe5958d0d64/how_to_calibrate_omron_hem_7121.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/acido_nitroso_hno2_estructura_de_lewis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a925ee-8e68-4c93-8ef6-9d0f890349e1/what_is_it_called_when_you_combine_two_words_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd8cac0-7bcf-4600-8736-855defbc155e/the_life-changing_magic_of_tidying_up_audiobook_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c44471c-4bdb-41f5-be3d-894573b5a38b/9017687386.pdfIn PDF document text
    • http://dokelegusipodi.epizy.com/fasawip.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_off00012c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C70 5484 bytes
SHA-256: e309f8460d692f10356cb9b40b6efe5e2dd6d04022df5ddade9ba680586f8082
font_01_sfnt_off00013f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F00 11272 bytes
SHA-256: b48b4ae7cc321033caa95d7389981a7d5514476e15c022594b5ef5b9555c4010