Malicious PDF — malware analysis report

Static analysis result for SHA-256 663e7c05b5ac59ed…

MALICIOUS

PDF

79.7 KB Created: 2021-02-16 00:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c66ef384f92e337ca7eb8dc30c0172f1 SHA-1: a8a06cd0e0d6252cb775aea69fa5265175a606ee SHA-256: 663e7c05b5ac59ed26070b6c9230d779f66a302c3fbba020e41146a7385121ff
192 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, indicating an attempt to lead the user to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains elements related to the URL 'how to manually recharge water softener', suggesting a lure to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=how+to+manually+recharge+water+softener In PDF document text
    • http://astropsychology.website/manchester_city_2048x1152_wallpapercip27.pdfIn PDF document text
    • https://gasilarax.weebly.com/uploads/1/3/4/5/134595303/1104928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_5fdb9dacb4635.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/jcjcJqL/80539697262.pdfIn PDF document text
    • https://mefirotevi.weebly.com/uploads/1/3/5/3/135314773/a9476c0d7b0e20.pdfIn PDF document text
    • http://opensol.xyz/jogevirugebukuwozavupojigqqmq8.pdfIn PDF document text
    • http://ru-en.xyz/career_coaching_handbookez5n2.pdfIn PDF document text
    • https://dipakexamima.weebly.com/uploads/1/3/1/0/131069759/1571872.pdfIn PDF document text
    • http://smirno.life/6787044073597rp6.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/Ciiihjd/wizuvegemotazape.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/heanZaZ/my_bird_screams_when_i_leave_the_room.pdfIn PDF document text
    • http://pocki.top/905382597292aveo.pdfIn PDF document text
    • http://lupaper.22web.org/depigobeke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449399/normal_5fe1d3a420091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_60248d2caa76d.pdfIn PDF document text
    • http://noxokolozoj.iblogger.org/baby_shower_invitations_templates_free_for_word.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/dichdGC/polixoduvasan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_601df36cb2f0c.pdfIn PDF document text
    • https://metiledozixav.weebly.com/uploads/1/3/1/1/131164016/werasilufirikaf.pdfIn PDF document text
    • http://gagewetero.iblogger.org/best_cartoon_photo_editor_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/aBiepji/bomonurima.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/sgdVCge/nizutax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wikilupari.epizy.com/20336448189.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_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 5448 bytes
SHA-256: fda88f5466821cb20374646543d5fd70bf4f9beec7346864c78274be8ec38c18
font_01_sfnt_off00010d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 10556 bytes
SHA-256: 76d58ef87d77e0de147e32018b263d99d1250cef136cf593897a28cb215b92f2