Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0deab490f6d5d3…

MALICIOUS

PDF

80.8 KB Created: 2021-02-05 05:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c6587a0a11571df019ff057ec71da06c SHA-1: 39b72d4df915d845d8744aa034a66367ab19e97e SHA-256: 9d0deab490f6d5d31c8b06d060c00307915f4eef991941fc03534ae21b4bc145
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically indicating phishing and trojan activity. The presence of a large number of external links, including a 'link farm', suggests an attempt to manipulate search engine results or redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely intent to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=neonatal+encephalopathy+nursing+care+plan PDF link annotation
    • https://cdn.sqhk.co/gananotez/jh4V5hh/demolition_derby_3_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/GWEUthi/bekedekomu.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/gcX0G5z/screen_recorder_for_pc_with_audio.pdfIn PDF document text
    • https://cdn.sqhk.co/fivukidado/jejcjcc/flight_boards_for_wine.pdfIn PDF document text
    • https://cdn.sqhk.co/sirobuse/4ohhbjb/thanksgiving_day_pretty_girlfriend.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/jf3g2ij/rider_strong_boy_meets_world.pdfIn PDF document text
    • https://cdn.sqhk.co/dijadive/gdijTia/potunis.pdfIn PDF document text
    • https://nevipezuke.weebly.com/uploads/1/3/4/6/134652321/6908501.pdfIn PDF document text
    • https://cdn.sqhk.co/xejulonejo/havhiOQ/76662704713.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/dzhiNja/simple_birthday_cake_decoration_ideas_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/hjhe4hd/best_free_weather_apps_for_ipad_2019.pdfIn PDF document text
    • http://mefizilexofe.66ghz.com/what_is_a_push_notifications_android.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/dAhjpJB/walibugovapak.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/Oijshem/jozuj.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/ghiXjgA/puppy_wallpaper_iphone.pdfIn PDF document text
    • https://berekiba.weebly.com/uploads/1/3/1/4/131482976/makavero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nokolul.epizy.com/bisubifujafedinik.pdfIn PDF document text
    • http://wedutatitupaze.epizy.com/django_bootstrap_form_readonly.pdfIn PDF document text
    • http://rafopaju.rf.gd/35920904713.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_off00010122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 5264 bytes
SHA-256: fdaa14ab847f18c7970b7aa9c5dd16872a3adf3a2c5e200798374e31c74d78d0
font_01_sfnt_off00011312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 10036 bytes
SHA-256: 8a2710963d352a977ecae8326e2b66631164d6ef2625b8441ab1916251ae1b4b

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