Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1c3beae8d91ad2…

MALICIOUS

PDF

76.2 KB Created: 2021-04-08 08:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a71ce00aa54c254ab3fee68216a36f2d SHA-1: db4874cce418ce780b280b61516b57ab7bc90ea9 SHA-256: 0c1c3beae8d91ad2c636b3fbf049cc10daf65a58b8db79357d7adc8c4cfbfa51
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 0.9992

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://soxebez.ru/wix?keyword=nihss+answer+key+group+a+patient+4 PDF link annotation
    • http://xasanefajisa.sportsontheweb.net/zaderiwer.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/sRghfib/samsung_galaxy_s9_ringtones_folder.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/QvrgfCn/dujixirirus.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/SjrAife/play_free_online_video_poker_casino_games.pdfIn PDF document text
    • https://cdn.sqhk.co/jawadagive/WieQCZI/35165906425.pdfIn PDF document text
    • http://leqqurint.online/does_beet_juice_help_with_high_blood_pressureh2qc3.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/vejurumilef/gcij1ua/16502834408.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/weight_loss_diet_menu.pdfIn PDF document text
    • http://boothattendant.com/kagapipigekeremaiopq1.pdfIn PDF document text
    • http://openlait.pro/path_traversal_cheat_sheet_githubw200l.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/adverbs_of_time_and_place_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xirozaza.onlinewebshop.net/ravenloft_2nd_edition_modules.pdfIn PDF document text
    • http://fetekovabu.onlinewebshop.net/sivarozagidewede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1fb250e-fa24-4e6d-9a4e-9764b3d1094f/pltw_1.1.2_answer_key_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d68f91-4d33-4cc2-a0ad-daa5376fc943/tanezisupizof.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/jotuvezozuzituf.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/90155808679.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/lagu_dj_asmara_remix_tik_tok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e2a9010-d641-45ed-a8d3-5901f9848e4c/werux.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/48346135248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ed49e7-f4f1-4e4f-a635-27db6aedc0bc/sudujofika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2600a58-49d7-4bb8-ad2f-f5ae0d8baa94/20810062487.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_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 5364 bytes
SHA-256: 77671698bff967135bc7e46bd5e19ee8db8bb0c9b85285dba367a6048e05f14d
font_01_sfnt_off0001010b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010B 10260 bytes
SHA-256: a66fc1a61f29cb1d7f7d2f39f5442a76a84d256baddcc3a34eb6c2e584521763

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