Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22ef596608acb9b…

MALICIOUS

PDF

87.3 KB Created: 2021-02-19 06:16:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4c260e67612dc04a039f12ea33a3a13f SHA-1: 365ab23d84fecf0baf240d5bc1ef6d707deabd9d SHA-256: d22ef596608acb9b0d43872eee0c1bd4bbfb8484aa742b70825fbd80b6605df5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a PDF link farm. This suggests an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous URLs points to a redirection-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=can+jane+the+virgin+speak+spanish PDF link annotation
    • https://cdn.sqhk.co/zebenane/iciijhh/lurinoluzokef.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/daiiy5b/angie_s_list_super_service_award_2016.pdfIn PDF document text
    • http://boomerangoo.site/download_milfy_city_apkr0h24.pdfIn PDF document text
    • https://cdn.sqhk.co/lolumebitana/ihfhiha/92467729660.pdfIn PDF document text
    • https://cdn.sqhk.co/ragekasa/hCggyib/chase_mobile_digital_wallet.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/bjijgeW/baby_shark_toys_pinkfong.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/e8Hgors/predator_viewer_apk_aptoide.pdfIn PDF document text
    • http://iqecoportal.ru/jemetatidijesapusozasoj0n2pe.pdfIn PDF document text
    • https://wudonazig.weebly.com/uploads/1/3/4/6/134675044/99e9864a1.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/c4whejg/old-_mobile._bet9ja._com_check_coupon.pdfIn PDF document text
    • https://lutafutenitar.weebly.com/uploads/1/3/4/3/134381418/4420e2f.pdfIn PDF document text
    • http://spainsale.pro/c_t_o_ka_full_formo5cj1.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/iaEViai/beer_pong_championship_belt_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zinazejoras/8heBFTO/stickman_backflip_killer_5.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/hdqjdig/dylan_scott_my_girl_song_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/verikiweneza/mijPxGL/kenijafa.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/Ighjahi/planet_earth_narrator_morgan_freeman.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/ihiidlU/gelijonomanur.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/dVkm28j/descargar_gun_strike_3d_uptodown.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/xavesorozosawuwose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 5156 bytes
SHA-256: 995569ce6184577c5328c8e22da5a72178024699cf9cc561faff7592e91d2d3b
font_01_sfnt_off00011065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11065 12852 bytes
SHA-256: 418998c6c1dc4df69bc52bf2de1a28fc149397be25d48fa2412627ecce49afac
font_02_sfnt_off000139e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E1 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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