Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f82a37f0671c3b9…

MALICIOUS

PDF

73.5 KB Created: 2021-03-05 01:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 76c4461c16d895d1e5fd49cc0e1f7d8d SHA-1: ada6a1370b77ff7e847923e60cd39e7addeac0d1 SHA-256: 6f82a37f0671c3b9afa2ab9f6c7094523dee9022e84b5dd538bb083f662aab21
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to government or educational topics, likely to trick users into clicking malicious links. The presence of external URIs and the link farm heuristic indicate a strong intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8823

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/award?keyword=describe+how+the+3+branches+of+government+work+together PDF link annotation
    • http://kapunogukak.iblogger.org/kawofonizirevodezaren.pdfIn PDF document text
    • http://zaximudetebase.iblogger.org/manualidades_de_halloween_faciles_con_papel.pdfIn PDF document text
    • http://vusejulene.iblogger.org/32373575455.pdfIn PDF document text
    • http://wozutujetotox.iblogger.org/cub_scout_tiger_handbook_free_download.pdfIn PDF document text
    • http://discout.online/metegovaag65i.pdfIn PDF document text
    • http://wupofifaxixusi.66ghz.com/advanced_english_picture_dictionary.pdfIn PDF document text
    • http://bevubupowin.22web.org/how_to_prepare_for_fmge_from_1st_year.pdfIn PDF document text
    • http://anarchymedya.com/35339792992t588i.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/letter_of_intent_template_grant_application.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://napezidemilolez.epizy.com/lalipixin.pdfIn PDF document text
    • http://baxirogujugiji.rf.gd/boat_usb_cable_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e97bd0-0eac-4a5e-98ab-af5db9480826/novusujoxuworakixog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/392df17a-6a31-4445-af5b-74554a7fae40/what_bible_says_about_adultery.pdfIn PDF document text
    • http://sedijinuv.epizy.com/arcsoft_portrait_plus_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/vonasefesazila.pdfIn PDF document text
    • http://dapobepopid.rf.gd/rutejuzolud.pdfIn PDF document text
    • http://petilawunabebi.epizy.com/25766343420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b154909b-5957-4b83-b2ca-1207a57ddf15/how_to_switch_sim_card_in_lg_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328300f0-a22b-469b-9518-2a95163d630b/fizukane.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/48102520536.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AB 5780 bytes
SHA-256: 3d1180870f93686a042f55a52ea684a2653de611bea7619e349057fcc838f40d

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