Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db1a1ba0e680c94…

MALICIOUS

PDF

120.1 KB Created: 2021-03-08 13:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5862cd31b8f93cd1659548ceedc5b2bb SHA-1: b50b5e3aa124572dc8dfa687785c2524db8ad8b9 SHA-256: 9db1a1ba0e680c94545b8e006623cf0c78a260cc1f67c6e6c0046299b9e78cfe
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary URLs, 'https://dafemum.ru/123?utm_term=rs3+temple+of+aminishi+solo+guide', is likely malicious and intended to lead the user to a compromised site. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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
  • 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://dafemum.ru/123?utm_term=rs3+temple+of+aminishi+solo+guide
    • http://dakisemakegag.sportsontheweb.net/77345499898.pdf
    • http://pe50off.pro/state_why_transition_metal_oxides_are_added_to_pottery_glazesv6g6i.pdf
    • https://cdn.sqhk.co/zidexamuwela/5Pkhhw2/bafinapezanefaju.pdf
    • https://wagigezo.weebly.com/uploads/1/3/0/7/130775958/2d45aeeb.pdf
    • https://cdn.sqhk.co/dopuwene/wVhglhh/big_game_hunter_2012_wii.pdf
    • http://gromstroy.com/43129341983b2ex5.pdf
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/9960245.pdf
    • http://sunufosabupes.scienceontheweb.net/what_is_the_universal_remote_code_for_tcl_tv.pdf
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/lununetiz.pdf
    • https://kumaradogutaf.weebly.com/uploads/1/3/0/7/130775833/5820372.pdf
    • http://shopwithsale.website/453246183107wgjm.pdf
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/tuxafoki-besuvemet.pdf
    • http://sajiwurejedetu.sportsontheweb.net/93877008752.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fejatepudopito/company_final_accounts_format_schedule_3.pdf
    • https://uploads.strikinglycdn.com/files/3e382c52-c15e-47d1-b52d-779a62062fe6/31106189044.pdf
    • https://s3.amazonaws.com/daraniwekamidir/soxafivanogudugigunu.pdf
    • https://s3.amazonaws.com/xurixado/simplex_4100_manual.pdf
    • https://s3.amazonaws.com/safago/the_bronze_horseman_book_3.pdf
    • https://s3.amazonaws.com/bikikanafopavu/87018544462.pdf
    • https://uploads.strikinglycdn.com/files/579a6c4f-3efb-49a4-9943-d9a6d6188065/el_principe_maquiavelo_resumen.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000162c4.bin
9f17e0970af40a96cb1fa5805791b6905dc7f6d31cb4eba54bea0d01aed4c9ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162C4 5656 bytes
font_01_sfnt_off00017636.bin
bd66137f12957a747859fa89976fef34c5cdb3fa18dac664ab472740aa9e3676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17636 5532 bytes
font_02_sfnt_off000188e1.bin
cd2d3b9f076b38eed745d00ec3c6212b7ff74505478f08bb8a2b8d9d78b0d31f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x188E1 2468 bytes
font_03_sfnt_off000193a1.bin
13825c796e24677a230897093a857353220b9ec539356404bed74c1380f38c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193A1 11996 bytes
font_04_sfnt_off0001bc85.bin
b2597dfdf4f368cb997d055d648b444854ae309694898e2e2455f0ec6f66ed41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC85 16172 bytes

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