Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ce19c7d16a8ed2…

MALICIOUS

PDF

80.1 KB Created: 2021-04-02 02:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5c158eacae07d77785208db0538c5035 SHA-1: 5a8a766c1d2259bc8f2bebac9a24b4b300709019 SHA-256: a6ce19c7d16a8ed23ab1339fa57a371e0102555f24fc943ef0435220204b986c
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-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://jottigo.ru/aws?utm_term=rii+mini+x1+touchpad+not+working PDF link annotation
    • http://online-sistem.site/jojedugudonoa93vv.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/zijdjak/lasiwezenurumisuso.pdfIn PDF document text
    • http://silusexiva.iblogger.org/build_guide_maokai_top.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/hbVbVbj/61685339285.pdfIn PDF document text
    • https://cdn.sqhk.co/nunexijezep/gctifbZ/gixeladanexusijebuf.pdfIn PDF document text
    • http://paktum.pro/emotional_videos_for_whatsapp_freeau7ul.pdfIn PDF document text
    • https://cdn.sqhk.co/zixapegof/didficc/php_code_beautifier.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/iipIhjc/moviestarplanet_2_game_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f510e586-b8b2-4436-ba1b-fd43ec0282ad/a_scanner_darkly_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f01fc6-6a88-46bd-9903-b7a2a4ced687/monopuvadodifomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc210ce-2da2-4afa-b495-2245565b6324/saga_harry_potter_editorial_salamandra_precio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e7aaa0-4040-4b40-92c3-671475ca7990/how_to_blend_colored_pencils_drawing_tutorial.pdfIn PDF document text
    • http://gewapapis.epizy.com/31284632323.pdfIn PDF document text
    • http://jopinewo.epizy.com/wizard_of_oz_book_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160c4c0d-0528-4277-8e3d-ef016f927953/lebefominesujaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5cf5a5d-d69f-4df0-9c3f-05deea184c7e/bopor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ffb48b-c28a-43ed-ad2f-a8cab0f64e1d/481589686.pdfIn PDF document text
    • http://xotepugiz.rf.gd/android_games_offline_high_graphics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b83f06f-4fa4-41e0-aaa2-1a9b97ed0587/electrical_engineering_objective_book_free_download.pdfIn PDF document text
    • http://renozupopobija.epizy.com/37743223817.pdfIn PDF document text
    • http://tuvusekore.rf.gd/43014622236.pdfIn PDF document text
    • http://mujopoweter.rf.gd/brooks_brothers_dress_shirt_sizing_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ad9f6b-20a6-4ade-8171-44abf4b02454/leginexopuwumobatamum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 5324 bytes
SHA-256: 92e05daec59fa7e6d92462ca2b237551ae78ec615ea39ff279a5d8eabdb2a95f
font_01_sfnt_off0001000c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000C 10812 bytes
SHA-256: 9e16bf6cbc65125b0f36d608bc05bca7b26537d4628a77a3cb14853e925610fa
font_02_sfnt_off000124cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f