Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1f6e22f84482c9…

MALICIOUS

PDF

82.3 KB Created: 2021-02-04 00:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7b07ac2eaf056a301e189d7b0aa936f2 SHA-1: 727b7f8d2360324c0152455f7b1560a8a0c2f710 SHA-256: 0e1f6e22f84482c960853db8daf497ac4bfa90eb19e34728e7662ddcdc26795b
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, many of which are on disposable hosting and appear to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to a dictionary PDF, which is a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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/123?utm_term=dictionary+of+literary+terms+by+martin+gray+pdf PDF link annotation
    • http://cosmosqrab.online/34622433236q35ww.pdfIn PDF document text
    • http://lewuvajenajen.iblogger.org/incredible_quotes_to_guide_your_life.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/bozozadirojotibubaranogog5kgl.pdfIn PDF document text
    • https://cdn.sqhk.co/jutalufelex/Uijgijf/fekanumir.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/d9xjeZc/monster_attacking_city_movie.pdfIn PDF document text
    • http://wirelessinfo.ru/xigovubumatirikaweruzbucj7.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/KMgiX19/student_beans_discount_boohoo.pdfIn PDF document text
    • http://vejobazure.22web.org/after_effect_title_template_free.pdfIn PDF document text
    • http://domastmsk.space/nafazimifapuzepipunudm3tul.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/iFgcgia/21291245957.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/Fhd7Re5/garorewajitikesun.pdfIn PDF document text
    • http://bezigex.iblogger.org/adobe_air_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/ZFgdSuK/xaxomewawulewudored.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xibiwoziveva.epizy.com/screencast_software_for_pc_free.pdfIn PDF document text
    • http://tudutov.rf.gd/american_beauty_script_free.pdfIn PDF document text
    • http://duzujowe.epizy.com/hmicfrs_domestic_abuse_report.pdfIn PDF document text
    • http://borarujedumamut.epizy.com/xemino.pdfIn PDF document text
    • http://revupeponalewuj.epizy.com/fatemovixedutuzorimab.pdfIn PDF document text
    • http://tesuzegijibonu.epizy.com/54926686663.pdfIn PDF document text
    • http://begosene.epizy.com/dusabidirupilijo.pdfIn PDF document text
    • http://lekinip.epizy.com/29278777794.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_off0001008b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008B 5716 bytes
SHA-256: 3de048b23b5aa1303189d306a47d475bc8eddeb558898cea202941a08aeb80d1
font_01_sfnt_off000113f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F4 12260 bytes
SHA-256: d40d1d9b40237f50310d32458b5116645a67ac9b84fc9b07874bee5edcfa44a3

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