Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a884f6ff9f6fac…

MALICIOUS

PDF

82.3 KB Created: 2021-03-11 10:13:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 51e4b748181ee729cb040377eee6342a SHA-1: 5680578a23343eee2d3cb49bbec67d79fe05399d SHA-256: 80a884f6ff9f6fac6c7b52c82fe3edd91a167809f2180e08f4e9c386252d8309
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and potentially malicious hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

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://lozipotod.ru/award?keyword=the+blaue+reiter+almanac+pdf PDF link annotation
    • https://cdn.sqhk.co/vanewano/dPjcroN/popularmmos_lucky_block_race_new_episode.pdfIn PDF document text
    • http://muvubaziforobe.iblogger.org/20929459455.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/hThjLjj/96159129093.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/jgid9ij/zixuxulimiraporu.pdfIn PDF document text
    • http://pifozuvarivin.22web.org/google_sheets_offline_version.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/hjZjjjd/enerpac_columbus_wi.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/Oificgh/orion_floating_locator_electronic_sos_beacon_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/hfogf3k/hillsong_worship_songs_guitar_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/VVwGXgU/cinemark_colombia_armenia.pdfIn PDF document text
    • http://dunizajo.66ghz.com/56317865284.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/hp_chromebook_14_g4_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/the_selection_netflix_movie_auditions.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/37537758280.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_2c42cd410a904b4a95b561036497170c.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_a52c01701c204728b8989c461a97eafc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutogugej/customer_engagement_strategy_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952af590-55a2-4823-a708-9967b2026a0d/how_to_trick_tinder_algorithm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079819f9-27ff-4737-95e1-1b39c69acdec/25072979709.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/tolelumak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31dc0748-9841-48c2-b838-079add3fe9a6/manual_ka_matlab_kya_hota_hai.pdfIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_96e0695e9f7840b7aaf0b14d386700a3.pdf?index=trueIn 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_off0001068d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068D 5308 bytes
SHA-256: f61f9d93f6ef2f95d967c446f77e2a17e80f34d2d5016f715021342b84390731
font_01_sfnt_off00011868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11868 10280 bytes
SHA-256: aa7c162444d4a14ad7127a32ea27dc1ca8e9eba41fafb5bf8fa2d6ee6d012a84