Malicious PDF — malware analysis report

Static analysis result for SHA-256 5207f6be554a6816…

MALICIOUS

PDF

79.1 KB Created: 2021-05-03 19:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 88ae4bc68733b8a3a72ec885ee203a23 SHA-1: bfae5db3e1ff35741c43b53016b0d6ec3206fe51 SHA-256: 5207f6be554a6816d2c6d92b24be536ed01ec55c6acb66119b658239d854fed8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection mechanism. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While no scripts were extracted, the overall structure and heuristics indicate the PDF is designed to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/strik?utm_term=mgma+family+medicine+salary+2018 PDF link annotation
    • http://vixemifojetinag.sportsontheweb.net/xiserisaribozopeloze.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/8197798073.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/silasa.pdfIn PDF document text
    • http://seweripuwas.mywebcommunity.org/21274530577.pdfIn PDF document text
    • http://everydayy.fun/8026683468520vk0.pdfIn PDF document text
    • https://gutinevar.weebly.com/uploads/1/3/4/6/134611255/denuxerenigulezugoki.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/Ojd0Mjg/vibonukatafivamul.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/jw7DgfI/dizak.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/PHjevgi/rum_balls_recipe_easy.pdfIn PDF document text
    • http://fitokapss.xyz/how_do_timer_switches_workha0v3.pdfIn PDF document text
    • http://the-job.ru/win_bet_app2dvso.pdfIn PDF document text
    • https://boxuvudadutubip.weebly.com/uploads/1/3/2/6/132695546/5e3d61f0f2d6101.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/hfebTVw/wetos.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/punigadimetelasoxipuwamem.pdfIn PDF document text
    • https://bubigijezifaju.weebly.com/uploads/1/3/1/3/131380429/63fab4ec.pdfIn PDF document text
    • http://sexesex.site/mimekodinazofafiwidisaziqd99.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/gf94agi/merge_town_online_spielen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa18bc64-a58e-42a9-99c7-c2519e03b631/tefajelobebakijinodi.pdfIn PDF document text
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_37734b35b2104d55a666433a6dab1ad0.pdf?index=trueIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_a5a3ea311acf49bebe6a142cf9e88a2f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/542c7961-6fa5-45e3-86b2-36a64325e6c9/bepinomeximebebilagofij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67320d06-870b-498b-8793-eaff27fe4d04/vocabulary_for_achievement_book_answers.pdfIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_0d79af9cbd094856b4933c05c038c46d.pdf?index=trueIn 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_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 5968 bytes
SHA-256: 990696b6abdfa82e1477e6aadd0ff36faeecfe33ddf9c413c789a20ea237e280
font_01_sfnt_off00010922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10922 11156 bytes
SHA-256: 11d58ee3f255f341e75385adbcd6d2cb8a1127816941e5ba1a06dca4695a015a