Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9421c99dac87a62…

MALICIOUS

PDF

89.5 KB Created: 2021-03-13 16:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7261328d27ec3ec6c0754609137ac0e6 SHA-1: 98068b7ffdeea46d7ec53681fc6adb422dd219ef SHA-256: d9421c99dac87a6294d9b8febb280bea0a3ef5db0557889a9cf508c984a58fe8
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 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.
  • 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://ponafet.ru/wix?keyword=slip+or+trip+assignment+answer PDF link annotation
    • https://cdn.sqhk.co/tajiwikiter/KkgcWfF/rei_commuter_bike_shoes.pdfIn PDF document text
    • https://cdn.sqhk.co/mibazudifij/gjvig8c/outlook_365_not_working_on_android.pdfIn PDF document text
    • https://cdn.sqhk.co/puvelumilum/ijgjjgj/62353888376.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/jgJqihK/1227253793.pdfIn PDF document text
    • https://cdn.sqhk.co/xetokive/aTWiaqz/status_video_download_tik_tok_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/tgfjfhb/turbo_kit_for_toyota_tacoma.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/bPrRZ7I/child_care_aware_navy_waitlist.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/hlAgjCJ/nevomedonitogisagig.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/FnjddrZ/gunudoxozisamejaguzeba.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/higjigg/random_64_bit_integers.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/hiajacs/kivul.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/ggehZwr/crazy_for_speed_2_apk_mod_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/used_ford_mustang_2.3_ecoboost_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cdaa97-bca3-49cf-82b5-305a6cf8fce4/54847141192.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/kenmore_116_vacuum_bags.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010ecae9-a37f-4314-a0e8-7626287c3164/how_to_make_a_crochet_circle_into_a_square.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/dotinujagujefuxav.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/cafeland_restoran_oyunu_apk_indir.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_473b3a0b8aef407abdaeab406ec80213.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_b4315dd42d1b4050a7c99597a2c92a81.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a759d4e-64b4-48ce-bc2d-cab9e75ab1e5/beretta_92fs_compact_italy.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/b_e_c_i_l_full_form.pdfIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_777de2de7df34a2fb8863c6ccbe18a61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0429005-9ed2-4261-a433-827340fb5caf/gopipazererif.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://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_off0000f5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B8 6004 bytes
SHA-256: 89c4e34ffc2fa919a0f9643c89aa9029338ebc7b0605add407ebde2e4bd83dbc
font_01_sfnt_off000109d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D4 5336 bytes
SHA-256: 6f2382ac9679215a25f707775bf3cd709cb9be5853a7a928bfea885560ebfa64
font_02_sfnt_off00011bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF2 11424 bytes
SHA-256: a219825a50b850720efbe03aa82f269a3c0383fb4e95a05d5c4e002d1ab39b02
font_03_sfnt_off000142e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E5 16160 bytes
SHA-256: 7e63eb3bed9c4ceaf47e86587cf77a789dba98dd2b4db382f0c7f052a0aeb8ce