Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba45b9344980e256…

MALICIOUS

PDF

114.5 KB Created: 2021-02-12 06:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 61e0b61d90e32f5d7ea52fbf511a8df3 SHA-1: 904bfc42453771a37e83ba086d45f9ec8e6d552f SHA-256: ba45b9344980e2567f948af80cdd7de07f3b4d132f5ff31f5fa43a00abe1b1c6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9663

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://druttle.ru/wix?keyword=eid+2015+in+bd PDF link annotation
    • http://xogabimodefage.iblogger.org/igcse_english_informal_letter_example.pdfIn PDF document text
    • http://fbcopyright-center.com/goanimate_for_schools_character_creatoritx7l.pdfIn PDF document text
    • https://cdn.sqhk.co/jivobukafon/WgefMhb/flash_alerts_2_apk.pdfIn PDF document text
    • http://jatuligirez.22web.org/hum_hain_bemisal_full_movie_mp4.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/6e84215d832d84.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/c1Cfggd/disney_apple_tv_app.pdfIn PDF document text
    • http://center-about.com/pugh_matrix_template_exceltpvn1.pdfIn PDF document text
    • http://onlinesos.tech/74092703929a8ifo.pdfIn PDF document text
    • http://azorocheat1.xyz/neputamezuroz4u0g.pdfIn PDF document text
    • http://b4shop.icu/gezazivobixajusodenhe7l.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/Y8s7Ahh/7984212531.pdfIn PDF document text
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/kegokoxezewidilu.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/jaLtpYE/world_war_1_complete_history.pdfIn PDF document text
    • http://good-production16.site/projet_ecotourisme3xmwz.pdfIn PDF document text
    • http://my-favshopg.online/best_hard_sci_fi_books_2020nnmdd.pdfIn PDF document text
    • http://websporizlehd.com/scott_brown_otorhinolaryngology_free_downloadfccut.pdfIn PDF document text
    • http://waniwidolo.66ghz.com/project_team_assessment_template.pdfIn PDF document text
    • http://oyuncuxx.com/gajamuvawasotlmpoy.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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/mefovu/samuele_bacchiocchi_books.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/lujoxopesukevud.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/33245739852.pdfIn PDF document text
    • http://nenedabex.rf.gd/apache_maven_3._5._0_for_linux.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off00018b93.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18B93 19724 bytes
SHA-256: 1d8502a32edf434b9d5dc8c9707a71473bd9119deb6969e2d7c0bc376eedeb68
font_00_sfnt_off00010056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10056 4376 bytes
SHA-256: 143a7bd3267953323eb70ad32475d320c0cface5a9ba97d05c98e46a4b5c212d
font_01_sfnt_off00010fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA8 4852 bytes
SHA-256: 4104436fe660107d1462168b63c4b80ece58483f3b5b4f1497dd34eecddcfc39
font_02_sfnt_off00012042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12042 8192 bytes
SHA-256: ab71264e7b411bb3987951afde1d94c1ff84594d5f632d97930bc105e916ad12
font_03_sfnt_off00013b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1C 3792 bytes
SHA-256: f77f631cdc83e39760ee60c6eeaeb78bb0169624c8f3b62e42186955fdfea5de
font_04_sfnt_off00014975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14975 2380 bytes
SHA-256: 81cde0b16b26761a6b06cfb7087952f3735e0b8c540f54dc7d0f2108ce0aa8a9
font_05_sfnt_off00015460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15460 5452 bytes
SHA-256: e6abfd6a81463936e7b44c811060b67f11988128b9250121a7970bf8a1eecd15
font_06_sfnt_off00016770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16770 10492 bytes
SHA-256: f92ac4f73363cf2c8b3d566329e8fe401fb9e6e051cdfe9a7c967bd977a967e2
font_08_sfnt_off0001ac3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC3E 3416 bytes
SHA-256: 16935f3d8d56e8300621c2808fc4db63b98ef5c1b0fc6887b91b89f6d430eb74