Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d1511cd73ffab6…

MALICIOUS

PDF

83.7 KB Created: 2021-03-19 16:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 82027ce313bae1ee6b17736f21141fff SHA-1: d8fa5d3ac2ecf87d7cb646c579c51be7c5bdd263 SHA-256: c2d1511cd73ffab6cda14008cd50f995cd1f7c4055d6cbdc998ebac9b55fd2c5
134 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

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://lozipotod.ru/wix?keyword=textnow+latest+version+apk+download PDF link annotation
    • http://se-mrush.com/how_to_write_a_good_objective_statement_for_resumet90st.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/upsc_botany_syllabus_2020.pdfIn PDF document text
    • http://sokfresh.fun/lulakoxebatizalidopalepik5hat2.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/delonghi_magnifica_s_coffee_machine_parts.pdfIn PDF document text
    • http://meetsoda.pro/rawebutujigilefurevadu0df.pdfIn PDF document text
    • http://saniwigudovo.scienceontheweb.net/active_and_passive_voice_present_exercises.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/what_is_true_about_human_autonomy.pdfIn PDF document text
    • https://sudejewakigalo.weebly.com/uploads/1/3/4/0/134040490/pavajomasopote.pdfIn PDF document text
    • http://terugate.mypressonline.com/rosemary_baby_review_indonesia.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/64133161725.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/pathophysiology_of_peptic_ulcer.pdfIn PDF document text
    • https://kabudinikibe.weebly.com/uploads/1/3/4/7/134716255/84b1e17656ab9.pdfIn PDF document text
    • http://luchdobro.site/7964826746w6k0i.pdfIn PDF document text
    • https://nasuzezigoma.weebly.com/uploads/1/3/4/5/134587751/2702207.pdfIn PDF document text
    • http://rankingcoach-seo.com/why_wont_my_iphone_connect_to_my_bluetooth_ihomewscgj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nununad.myartsonline.com/15868246968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9223e4b1-68ae-49f7-8a6d-e50d25c95fce/jalosenito.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/xugudenafojulezifejemunow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b66f85ef-d37e-4bab-a41d-ab3bf5b77c30/words_their_way_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b179bf-7b37-4a44-95c5-d8c3cc6bb095/harga_mixer_yamaha_16_ch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a50a152-cf67-4c86-936d-d902795050cf/44377279982.pdfIn PDF document text
    • http://womawujun.atwebpages.com/90829469229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b447cbe-6aa0-4a3e-a984-8490c53667cb/8483248918.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_off00010aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEF 5188 bytes
SHA-256: 4a2b0eae08db9f4e19f50d72bc77a1488ad57ad1f76f1b214b6fcbb48fa926e9
font_01_sfnt_off00011cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBE 10724 bytes
SHA-256: f4a0f98e98497e670665eae89a127ee660021ea17719b124ecc886728f98645d