Malicious PDF — malware analysis report

Static analysis result for SHA-256 24deb89fe76f38be…

MALICIOUS

PDF

92.0 KB Created: 2021-03-30 06:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3ba0505fd3fdec358f351178621343fb SHA-1: 816c2464d030b523af439cdcdbca4581ac17050e SHA-256: 24deb89fe76f38bebfd4bfdd7d3124c7e76655cd7ad55d72d62b57336f115afb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://zajinet.ru/123?utm_term=blouse+cutting+step+by+step+free PDF link annotation
    • http://peromopativej.mypressonline.com/wavawifabofagozorafawi.pdfIn PDF document text
    • http://kulinar2020.site/17775765071alnox.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/0ZvyKMT/canvas_student_sign_up_code.pdfIn PDF document text
    • http://krokoboko3.xyz/altered_carbon_netflix_season_2tseog.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/knot_tying_for_fishing_reels.pdfIn PDF document text
    • http://gufutaca6.xyz/45916035606nqffw.pdfIn PDF document text
    • http://gokojun.scienceontheweb.net/acrobat_editor_online_free.pdfIn PDF document text
    • http://show-visitor.xyz/rerivowudisuzizabotonawzdpz3.pdfIn PDF document text
    • http://terem.space/xidugisulefuzudefetigig9fyh.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/dgiqgge/national_baptist_sunday_school_lesson_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/Kichdxv/womens_christmas_tops_and_jumpers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/zagubip/90083206477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef62668e-fce9-43f6-ab60-6a3ce07fd37d/sp_racing_f3_evo_brushed_flight_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2cde5b2-cd10-45a9-9c43-e01055a25cc7/what_percent_of_boy_scouts_get_eagle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6adb96-f10c-435b-b3ef-5e5001752193/how_to_use_tracfone_sim_card.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/matlab_programming_fundamentals.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_81a1bc89a25e4949b64f63eef1bc51c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juduk/wavegukezapujabanani.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_0d274bcf790a4a428e0b5908dadc722e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/644a374e-0577-484c-91b5-289fbce11124/dizibipezajaxevedomukof.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C8 5264 bytes
SHA-256: 193553030b3789d7876a7fbe48b244e0cf8c975e6f6b29737cf8c834bc0edd0a
font_01_sfnt_off000114cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 6080 bytes
SHA-256: 44e33615f899ebb557af5cc281995ac990123b8748ca1e5a29577b9abfd12b30
font_02_sfnt_off00012918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12918 11316 bytes
SHA-256: 8900384de0ef4cd00695c1cd4bc6caa464e93bfd525aef9219c17782d87d5f6e
font_03_sfnt_off00014fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC6 5008 bytes
SHA-256: d23bcf7b3602a2ee5a516a7ac2d60a87b5bc11fb583b7e5c7e5d941ac9163ff8

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