Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa79eb3aab2cfda1…

MALICIOUS

PDF

73.0 KB Created: 2021-02-20 15:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79310fd9cef0b70e6e1116e34b79a819 SHA-1: eecd78c364bdff6de0895099d94f9691310ccbad SHA-256: aa79eb3aab2cfda114099e11ddb661e3230f26f0a7bf87385f19344b705efbf7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The presence of a large number of external links, including a link farm strategy, suggests an attempt to direct users to malicious websites. The heuristic 'SE_URGENCY_LURE' indicates the document likely contains text designed to create a false sense of urgency, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=clarifying+consent+answers
    • https://cdn-cms.f-static.net/uploads/4476416/normal_602ce7a99b769.pdf
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/tibamemu.pdf
    • https://static.s123-cdn-static.com/uploads/4463287/normal_5fe3dd248e909.pdf
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/5c448eace.pdf
    • https://cdn-cms.f-static.net/uploads/4462982/normal_602a1252a0f50.pdf
    • http://vafijevimam.iblogger.org/95428462293.pdf
    • https://bunoworerut.weebly.com/uploads/1/3/1/4/131438217/1390225.pdf
    • https://cdn-cms.f-static.net/uploads/4447914/normal_6026d32984f87.pdf
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/kadeti.pdf
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5fdbd94ea313e.pdf
    • http://tazikuruwuwozu.22web.org/72843968375.pdf
    • https://studentsuccess.org/SSO/csufresno
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mutodilevo.epizy.com/mathworksheetsland_order_of_operations_word_problems.pdf
    • http://kefasobodabaz.epizy.com/sindhu_bhairavi_tamil_video_songs.pdf
    • http://wetosunonatag.epizy.com/asmaul_husna_dan_artinya_serta_manfaatnya.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0dd.bin
134247839468715d59889ce8384c4e32b60a030c80473e01e9bfdcb160a0bfce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 5148 bytes
font_01_sfnt_off0000f28c.bin
858d6ceff4d5696ae01fa966fc448dc87d96f8c4d290de1616bd0cb73dfe5b12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 10684 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.