Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bd17cefdc6d9ed…

MALICIOUS

PDF

86.8 KB Created: 2021-04-06 20:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7fbda6c40b31e007809b5c761c0ad8f2 SHA-1: 53114af90832823af9483a8a02bedc9d9df473be SHA-256: 01bd17cefdc6d9ede4956dc5581d34ea06462f0914bd00fdef4909a19be77647
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 0.9990

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://pelibifir.ru/award?keyword=camerimage+program+pdf PDF link annotation
    • https://cdn.sqhk.co/goganededem/ieaiXhh/how_to_study_for_college_exams_quora.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/79130412945.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofigeniso/hgcL9jc/tango_blast_gang_signs.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwebuvowo/ijahgvT/fopowomevefoweruweregoren.pdfIn PDF document text
    • http://inglassrus.ru/is_bob_ross_deadyur0w.pdfIn PDF document text
    • http://ehaberdevlet.com/voxupukumegibc1v9g.pdfIn PDF document text
    • http://vanlit.ru/what_is_david_goggins_doing_nowwuxg5.pdfIn PDF document text
    • http://gazozasi.scienceontheweb.net/21961013298.pdfIn PDF document text
    • https://cdn.sqhk.co/zutigaku/gheigib/70396055203.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/d37e0873-9710-4fbf-aaba-651d72d813b2/wosepidir.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/fb_video_er_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8eaaab2-0989-4f80-876e-3374883e6997/zopezavudakujojanipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3d3fc8-71f5-4bd5-854d-0630ce427649/91492516058.pdfIn PDF document text
    • http://relivoziz.atwebpages.com/38612264551.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/bad_time_simulator_hard_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd11dff7-fd4a-443a-8db5-4263a5913109/romeo_and_juliet_character_map.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/ea_answers_hq_apex.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/matuxekapuvetiwel.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/paid_graphic_design_internships_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca4a72ad-8a10-40ca-9ef5-a2b7b5ff811a/6715328169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aaeee79-ff6d-41f7-923e-307effb9bc74/mq_error_2538_amq4059.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 5056 bytes
SHA-256: 1c98dfacd766238d6d2630af0cd4bc7318b830214063786e822ae0b773f200b5
font_01_sfnt_off0000fb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 2744 bytes
SHA-256: f7feed89497cfed8d7abbdea51cbbc7c8b32e8e54c3f57d399094f228262902c
font_02_sfnt_off000106df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DF 12180 bytes
SHA-256: 32690978efe512cc3d83a22846077cec23b90564164edd3b71a03434378f58b6
font_03_sfnt_off00012dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFC 16416 bytes
SHA-256: 1b19f5b9ae2aeff7929e120295d9aee049321614abc14b3ca723126b23f9dd5b
font_04_sfnt_off000143dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DD 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df