Malicious PDF — malware analysis report

Static analysis result for SHA-256 843f6f03fa0ceb6e…

MALICIOUS

PDF

95.7 KB Created: 2021-04-04 14:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 28904d6e38694afe5926bc129c1d87b2 SHA-1: 2f1b13efadea49b5fe5ed4413805982279ec4798 SHA-256: 843f6f03fa0ceb6eb0e0bceba964d5bb117c2af9f6dfdd7194171ab9984a6c9d
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=moviesda+telugu++2019 In PDF document text
    • https://napaxivate.weebly.com/uploads/1/3/0/8/130813999/vekinimopokulefokesa.pdfIn PDF document text
    • https://boginajidu.weebly.com/uploads/1/3/4/6/134693166/kapeb_felijagiwoga.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/18594668582gcith.pdfIn PDF document text
    • http://chistohome.moscow/maytag_neptune_stackable_washer_dryer_manualk0lut.pdfIn PDF document text
    • https://jagefebasedi.weebly.com/uploads/1/3/5/9/135993187/b33b00cfc364.pdfIn PDF document text
    • https://nukubutanedun.weebly.com/uploads/1/3/5/3/135309192/8652f0d2b015dc0.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/38b05b.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/xavuvibokeseda_zomoko_pedemef_nudodoxudupedex.pdfIn PDF document text
    • http://farexirofabi.22web.org/how_to_disassemble_a_keurig_k150.pdfIn PDF document text
    • https://rogaturo.weebly.com/uploads/1/3/1/0/131069781/dopinogi.pdfIn PDF document text
    • https://ledosixekesi.weebly.com/uploads/1/3/4/3/134313849/figowezadijugig-xozew.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/duzizufezelaxazimanuji72rv6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/waxapoz/dezazewux.pdfIn PDF document text
    • http://lekinip.epizy.com/civ_6_religionssieg_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/65150200622.pdfIn PDF document text
    • http://lebiwubeso.rf.gd/lejelamudewuke.pdfIn PDF document text
    • http://kibozitasosisan.epizy.com/the_imperial_march_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/91867240676.pdfIn PDF document text
    • http://jomewudixaf.epizy.com/how_to_sell_100_books_a_day_on_amazon_kindle.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/37559699360.pdfIn PDF document text
    • http://pikimavijepe.epizy.com/risk_management_example.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 5444 bytes
SHA-256: 79ecae52c57efdd13883a156f7bca1d8661738a7d7bc8484235797187a517541
font_01_sfnt_off000105a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0001110a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110A 10512 bytes
SHA-256: 81fb1be49da9789e380e4ee76f748e62420485a0ba99c9cf4128289d8022b266
font_03_sfnt_off00013558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13558 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb
font_04_sfnt_off000149fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FD 13196 bytes
SHA-256: 23183f23382f6a6dc9ec25888fa3023fbcc9e9d9f053f689bd44e1d239c695b7