Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a7e407cf8a5b95…

MALICIOUS

PDF

77.3 KB Created: 2021-03-10 02:09:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6dd9a0519f6a43874283c01045a8dcbb SHA-1: 26e9dcf40d15fa25d081c5b5157225772745d3d0 SHA-256: f7a7e407cf8a5b95dd7d1b54b74d19878871bb4b5bdb3d580b8e5f0ccdf97fbb
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 0.9997

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://midufefew.ru/wix?keyword=physical+and+chemical+properties+worksheet+physical+science+a PDF link annotation
    • http://padojobimo.mywebcommunity.org/gojiduvupegekikadufid.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/shevApz/45715465521.pdfIn PDF document text
    • http://ozalupa.space/sahih_bukhari_volume_2_hadith_1552lurss.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/Cichihg/easy_payday_loans_direct_lender_uk.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/watch_twilight_breaking_dawn_part_1_movie_online_free.pdfIn PDF document text
    • http://shopee24.site/864572386645fche.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/samsung_refrigerator_water_dispenser_not_working_after_replacing_filter.pdfIn PDF document text
    • http://mmmmmme.space/answer_to_complaint_sample_californiabzynr.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/dhdlSjc/24082345630.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/bfx6LoF/52630239037.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/define_data_mining_in_computer_terms83muw.pdfIn PDF document text
    • http://com-signto5.xyz/candesartan_available_dosage_formsn2cae.pdfIn PDF document text
    • http://kajipim.mypressonline.com/carry_on_wayward_son_lyrics_youtube.pdfIn PDF document text
    • http://kinoogf.space/217026071656dt38.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/Qihjjge/red_sun_today.pdfIn PDF document text
    • https://cdn.sqhk.co/komifugu/rjficJA/scary_clown_horror_game_adventure.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://s3.amazonaws.com/farowug/tokowa.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/mevovovijojuvokinatoru.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/71474341543.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/tutorial_audacity_bahasa_indonesia.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_off0000e3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EB 5360 bytes
SHA-256: 327e80a9cfd9687d7abd589fafe50d0f432614a2415b071b04b233c007bde767
font_01_sfnt_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 10280 bytes
SHA-256: 8e617955a9b372986ab30f2f4c932cc0668f0db0cce10c5e2907c8f139e7e097
font_02_sfnt_off0001193a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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