Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6f8ba5ed061c3e…

MALICIOUS

PDF

82.0 KB Created: 2021-03-21 21:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4f2012f89b8311cac4ef686654433528 SHA-1: 95579a5f95316732b0b380b335c62576f3d25cab SHA-256: 8c6f8ba5ed061c3e9511f0f848e7ce4b89de7871dcb01ee7cf3fd46649d82aa8
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/aws?utm_term=wordpress+change+user+permissions+phpmyadmin PDF link annotation
    • http://lamaded.mywebcommunity.org/90550519528.pdfIn PDF document text
    • http://kaladirav.22web.org/61234196718.pdfIn PDF document text
    • https://cdn.sqhk.co/nivatasob/7jilsL3/bypass_ssl_pinning_in_android.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/los_temperamentos_del_ser_humano.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/bermuda_triangle_marathi_book.pdfIn PDF document text
    • https://cdn.sqhk.co/bukoxomule/1jdYwjc/mezeg.pdfIn PDF document text
    • http://kedamijofulufep.mygamesonline.org/555805548.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/kansas_carry_on_my_wayward_son_song_meaning.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/zafebodudax.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/ahivhao/video_maker_with_music_and_effects_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/loxusovi/aehvQZg/modern_warfare_2019_sequel.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/16240970580.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gijuvaginitawaz.epizy.com/mobevuvafaxikemumaze.pdfIn PDF document text
    • http://pujumek.myartsonline.com/divemog.pdfIn PDF document text
    • https://b724dda4-e2e0-47c5-811c-ae3b7273578b.filesusr.com/ugd/a1e5ee_f186d6e1e78542a59a9f2079141344b4.pdf?index=trueIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_a7ab7abc8ee84ac8b51b639bccb72faa.pdf?index=trueIn PDF document text
    • http://sabixukavizom.myartsonline.com/fumiki.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/action_movie_fx_all_effects_free.pdfIn PDF document text
    • http://todoxejanifala.rf.gd/biodata_format_word_document.pdfIn PDF document text
    • http://lebusepuwiri.atwebpages.com/bulimia_anorexia_y_obesidad.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/vpn_app_for_android.pdfIn PDF document text
    • http://jejivosijej.rf.gd/bepaxirivimedodasosat.pdfIn PDF document text
    • http://nifiwirijapokaf.rf.gd/answers_with_joe_shirts.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/epson_wp-4530_wont_print.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 5572 bytes
SHA-256: d535b8f7dbc51cc8eced334942d965863db93022e4cfd45f546f956ede638569
font_01_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 12372 bytes
SHA-256: 524ce10ec4889c062a8ff163d2d9aa28949447415d1749a10ff087060722db03
font_02_sfnt_off00012427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12427 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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