Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fd0be81e775164…

MALICIOUS

PDF

81.6 KB Created: 2021-03-15 14:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff0359e56c45cae19a6608d9e7177e5e SHA-1: 55ad90789158b5ae57225aa3a857ddd549f08bfc SHA-256: 60fd0be81e7751644e387c87493b9977203963091dec86fd408b11638071de60
166 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 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://nipisod.ru/wix?keyword=how+to+unblock+emails+on+yahoo+mail+app PDF link annotation
    • http://topmassage.net/kannada_channels_live_tv_for_androidwv6h8.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/kumizofb09mk.pdfIn PDF document text
    • http://aov.one/melirejalifasozavadibuv19q6a.pdfIn PDF document text
    • https://cdn.sqhk.co/buzovegom/jh6idjd/4462799060.pdfIn PDF document text
    • https://cdn.sqhk.co/leguzufaju/igJSgeD/world_war_iii_maxthademon_lyrics.pdfIn PDF document text
    • http://copyrightnotices-form.com/amazon_echo_2nd_generation_priceyu1kz.pdfIn PDF document text
    • http://itravelimpressions.com/81180994547v4kn2.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/eiajcq6/spider-_man_rope_hero_games.pdfIn PDF document text
    • http://onlinesos.tech/60_day_notice_to_landlord_california_templatenj7jq.pdfIn PDF document text
    • http://rusherx.studio/pentair_water_easy_touch_troubleshootingp3417.pdfIn PDF document text
    • https://cdn.sqhk.co/fugutexifi/eGGzPic/xoziwulozof.pdfIn PDF document text
    • http://fesigemujelepir.66ghz.com/assassin_creed_games.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/az4hhjL/my_success_story_business_game_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/anQTE1t/rizakagumawajano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najaxobefirag.epizy.com/aaa_logo_with_crack_free.pdfIn PDF document text
    • http://rumasujosunux.epizy.com/kuzevejanodeguxerenez.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_7f8754cc920247b89f2c8be3a0ad5cd0.pdf?index=trueIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_cd76affc288d493e88e31b1e9540d270.pdf?index=trueIn PDF document text
    • http://jipokogave.epizy.com/tafetegegulolifixevifiri.pdfIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_ba7101f6766f4cc38980a4da81b95951.pdf?index=trueIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_e59005d3b28744f1b0eebea569a79b95.pdf?index=trueIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_92dfd76c3c9a4e84a2d745096a422612.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 5436 bytes
SHA-256: 51cc03aedb78ac29904011b4a93ef52a9421ba60ec8055f6fa0a8bcf2dc49cce
font_01_sfnt_off0000fa52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA52 11428 bytes
SHA-256: 96dfddce7755fc981682c0d85ea8064a0f73c3e730fad1ea254690d7ee5055d5
font_02_sfnt_off000121b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B2 16116 bytes
SHA-256: af71224fa4c0ab8a4959ed0ad3af7c1f81652a6f4c5851925e1d5b19c3ce931a