Malicious PDF — malware analysis report

Static analysis result for SHA-256 522ad66be0353eff…

MALICIOUS

PDF

85.5 KB Created: 2021-03-23 12:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b94ff6ac4a07d0c810b3c249345a9c46 SHA-1: be0c6f02300d0a41601ec37368fe67956883e986 SHA-256: 522ad66be0353effbd6c89abb49ad1fc9c7dceaf8a83bfaf45033ad4b4850b6b
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to searching for a specific PDF document, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://zajinet.ru/award?keyword=kamala+das+my+story+pdf+english PDF link annotation
    • http://usecabinets.xyz/mumevavapivus0wqu.pdfIn PDF document text
    • http://gufutaca1.xyz/tumepusevagegomebutaza7kgdm.pdfIn PDF document text
    • http://fitnesspack.net/64496713036pxsrn.pdfIn PDF document text
    • http://odemebayisitrafik.com/21955878644oy37g.pdfIn PDF document text
    • http://tizakeguwowil.22web.org/aashiqui_3_movie_in_tamil.pdfIn PDF document text
    • http://prequester.online/advanced_english_cambridge_bookygzpo.pdfIn PDF document text
    • http://myluckybet.xyz/rovopenezadebuxopufudh6y5d.pdfIn PDF document text
    • https://kuvobawodamelis.weebly.com/uploads/1/3/5/3/135350379/6510145.pdfIn PDF document text
    • http://astrology-personal.online/omron_hem-711_error_codesmi9u1.pdfIn PDF document text
    • http://kinorio5.xyz/pikaxvo7xj.pdfIn PDF document text
    • http://manybigs.space/mebidigimurxtoad.pdfIn PDF document text
    • https://basupetuwesaf.weebly.com/uploads/1/3/0/7/130739706/c162267410.pdfIn PDF document text
    • http://bitcoins-profits.com/bodmas_full_form_in_tamil7kywk.pdfIn PDF document text
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/wojogope.pdfIn PDF document text
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/fe7250bd3f.pdfIn PDF document text
    • http://bikizugupaka.iblogger.org/wawikugudovufusolab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_72f0a73ba87e4668a4b052d4980b1f0d.pdf?index=trueIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_d96244977a8441d0922740a612898743.pdf?index=trueIn PDF document text
    • http://wunitawuzufif.epizy.com/dell_latitude_e6430_driver_pack_windows_7.pdfIn PDF document text
    • http://filanak.rf.gd/penekugutanepe.pdfIn PDF document text
    • http://temanaxalagiguw.rf.gd/givasibiluzaxolivit.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 5524 bytes
SHA-256: f5e45a837cb756f4c8ad99235a261243f7cf62a84911a88eec1a44a5fa70e547
font_01_sfnt_off0000fea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 3220 bytes
SHA-256: 9ea1266ca930c6d17a4bde32b04c533000036ea99a596dace9c2a39639fea7fb
font_02_sfnt_off00010b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B43 11080 bytes
SHA-256: 47fd50f7bc77167597f2c4fdd5bcc8db12cf3417c5196d430c3bd3ec1e6245b7
font_03_sfnt_off00013167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13167 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1