Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf6218bf9d77979…

MALICIOUS

PDF

99.2 KB Created: 2021-02-20 17:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f107cafc55c8b372239a0710b051a1d6 SHA-1: 7891a5e5013418c0cbe228411c9c958519f8ac64 SHA-256: edf6218bf9d7797961634db68e9b983d0be2b10d88bfbb1c9457cadbebb38ffc
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised with search terms for car details. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish credentials or deliver a secondary payload. No scripts were extracted, but the presence of embedded URLs and the critical heuristic firing on a malicious redirector are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://yafferge.ru/aws?utm_term=2020+white+toyota+camry+xse+red+interior In PDF document text
    • https://cdn.sqhk.co/vavusiwi/HbEgcha/powelugadavadonofidag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444869/normal_602174aa84e3d.pdfIn PDF document text
    • https://cdn.sqhk.co/gotulurowav/gfXZGk7/dragon_ball_gt_intro_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/dJ0IWie/mens_short_curly_haircuts_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_601a7d3fbaa24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5ffc562ee10d5.pdfIn macro / runtime command snippet
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5fd6e0bc80d07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5fd0b8189a7cb.pdfIn PDF document text
    • http://worldhold.online/critique_paper_templatewo20f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405184/normal_5fe785637ff98.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/ggeij9f/stickman_destruction_zombie_annihilation_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/ZhBhggh/nbc_ct_news_live_stream.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploadsIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bifamomove/kerala_backwaters_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/xemebupiziz.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/horizontal_timeline_template_html_css.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/power_air_fryer_oven_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/annadata_bengali_movie_video_song.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_off000145be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BE 5588 bytes
SHA-256: da647d5ac6a40dfb53e3ff84707f229716e1c95e2faf536af59bc6cb0fb985bb
font_01_sfnt_off000158a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158A8 11420 bytes
SHA-256: 0fc447b86f3e52124fb2f53b7e6cf363d1ea7521a50a60fccc40fa0ec9c99751

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