Malicious PDF — malware analysis report

Static analysis result for SHA-256 7faa08e00b23e520…

MALICIOUS

PDF

77.3 KB Created: 2021-03-16 04:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52007721c314e76b6be57b51a030b507 SHA-1: d810cbff52a8d3336cc496423949aa209eb8484b SHA-256: 7faa08e00b23e5205d47b15f038fdc71bdb36e0a373e35cfeae4906bcdc7bdea
164 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the 'urgency lure' heuristic indicate a potential phishing attempt or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://druttle.ru/wix?keyword=snail+mail+game
    • https://fijuzezakuxulow.weebly.com/uploads/1/3/5/3/135391315/2159426.pdf
    • https://cdn.sqhk.co/dinokafoxume/ijc7zie/headache_medication_guidelines.pdf
    • https://sugelazo.weebly.com/uploads/1/3/4/7/134767002/74fb1c29.pdf
    • https://cdn.sqhk.co/tipefima/fzWjcjg/breeding_epic_dragons_in_dragon_city.pdf
    • https://cdn.sqhk.co/wajerewuwer/ghuHjfA/ghost_hunt_anime_watch_online.pdf
    • https://pemanawawe.weebly.com/uploads/1/3/5/3/135320082/gonadedawijuwuxufis.pdf
    • https://cdn.sqhk.co/jadizefon/ehgcR2k/emergency_alerts_iphone_8_plus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1fdb3f96-3881-4f19-9acd-759af3816bfa/61332081294.pdf
    • https://uploads.strikinglycdn.com/files/05d6326d-503d-4e6c-83c3-80a9eeaa6d1e/bojatiluramokoma.pdf
    • https://uploads.strikinglycdn.com/files/9d67bcce-e5cf-4e8d-b55b-2e7fe43bbd38/why_is_my_dell_latitude_not_turning_on.pdf
    • https://uploads.strikinglycdn.com/files/49e594af-c982-4244-b400-90f267d52075/65935032804.pdf
    • http://duxuramubot.epizy.com/calendar_app_mac.pdf
    • https://uploads.strikinglycdn.com/files/6060c8c0-b48c-40c6-9c8f-a27f9e14fb77/dirogegorumutiwakifonin.pdf
    • http://vonizupereru.rf.gd/74716653964.pdf
    • http://rotitow.rf.gd/7599398274.pdf
    • https://uploads.strikinglycdn.com/files/de97d7ba-09f5-4aab-934e-1bcb832e3adf/best_plugins_for_fl_studio_trap.pdf
    • http://jusudab.epizy.com/texniccenter_beamer_template.pdf
    • http://xakosafejel.epizy.com/dolotijewipiwo.pdf
    • http://lokemupuwife.rf.gd/how_to_use_a_prayer_cloth.pdf
    • http://vogokibogewete.epizy.com/bodas_de_sangre_frases_de_la_novia.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e592.bin
c235e466bfdbe09fbc795643c25d9218787b1464631f5e14961af0a4c03456e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 4432 bytes
font_01_sfnt_off0000f464.bin
a1f73ec26c238931fb54e925ee0869d38d31766e6df9c36ddfc3a11b295089ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 11140 bytes
font_02_sfnt_off00011a39.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A39 4324 bytes

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