Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bcc6b9ee59ffdcf…

MALICIOUS

PDF

83.5 KB Created: 2021-03-20 19:49:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61a1d685c22d1f9d21a8b50898c4c419 SHA-1: a3602ca19ebd9dbb95a1ea04ec5f5095a919c12f SHA-256: 1bcc6b9ee59ffdcfeeab4c4c33a5207858294d6cf9feb0d0166354d766a5a83f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect users to sites hosting further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/award?keyword=1st+grade+math+comprehension+worksheets+pdf
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/a4780.pdf
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/vemojutu.pdf
    • http://sarhello.online/optiplex_780_rameyt55.pdf
    • https://simakaxulov.weebly.com/uploads/1/3/0/7/130738785/8622408.pdf
    • http://vpntop.info/43537339932e9irq.pdf
    • http://begetus11ppz.xyz/54491460106n367c.pdf
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/6592202.pdf
    • http://kfnwejfnkwheklf.space/barber_shop_san_antonio_ibizawtwiv.pdf
    • https://xuvamifete.weebly.com/uploads/1/3/0/8/130874567/6950692.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6715bfdc-374d-4238-bdea-1830e3aacdf2/what_percentage_owns_the_worlds_wealth.pdf
    • https://s3.amazonaws.com/dowavelaxam/leliwivovejumuxonet.pdf
    • https://uploads.strikinglycdn.com/files/b034f1d4-a0ff-403f-8551-4714d5701ea9/hp_cp1525nw_maintenance_kit.pdf
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_aa609be3eece4b6b837d524660895080.pdf?index=true
    • https://s3.amazonaws.com/zifilobesumafi/cavetown_this_is_home_piano_sheet_music.pdf
    • http://vudasuluwiviwaj.rf.gd/9395298485.pdf
    • http://wamulax.epizy.com/travel_planning_spreadsheet.pdf
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_74057617ebfb4347a5aa71f35b5f46f3.pdf?index=true
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_1268e8d05c454627a2141f9c093e93e8.pdf?index=true
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_33b5f8084b6f4332a2f140bcbd5a3f95.pdf?index=true
    • https://uploads.strikinglycdn.com/files/23d5d56f-0e8c-4aa2-9e1c-c48efef3054a/primus_iq_brake_controller_troubleshooting.pdf
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_dcd9a4a316ac4058b6feaa46f068804e.pdf?index=true
    • https://s3.amazonaws.com/bibejovixapis/43711568520.pdf
    • http://komopojanali.rf.gd/smok_alien_kit_user_manual.pdf
    • https://s3.amazonaws.com/tobaziw/impossible_quiz_2_answers_18.pdf
    • https://s3.amazonaws.com/medaliwifufugel/lanajodo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105fe.bin
0db554b1800cb65876f98a85f55057d708276549704086afa8efe343f433580b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 5652 bytes
font_01_sfnt_off00011926.bin
aff96b961da9e21d05d188eb61f990d735467662d4c2dcf5ef3e1322f4e68b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11926 11496 bytes

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