Malicious PDF — malware analysis report

Static analysis result for SHA-256 f873a11c076bd6b0…

MALICIOUS

PDF

69.7 KB Created: 2021-04-15 11:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 42e570b3aadc3cde01117a44c002e546 SHA-1: 5941ac9749b477d722431c64d338873832523e88 SHA-256: f873a11c076bd6b043b93196ba825ae54a136e7dada5c7969013dd39eb591cce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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
  • 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://ponafet.ru/strik?utm_term=writing+in+the+biological+sciences+hofmann PDF link annotation
    • https://cdn.sqhk.co/texivewa/ifs2Tii/6547065253.pdfIn PDF document text
    • http://love-cosmetics.shop/kobalt_7_1_4_miter_saw_specso8dlh.pdfIn PDF document text
    • https://cdn.sqhk.co/beluvano/UfOuBlx/wejigosabamalivife.pdfIn PDF document text
    • http://hook-up.fun/4744472939bdsrl.pdfIn PDF document text
    • http://findfreegirl.com/83729896892bmzrc.pdfIn PDF document text
    • http://tipografiyav.moscow/what_is_the_best_exercise_for_a_50_year_old_manw11lr.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/does_costco_have_kitchenaid_mixers5byh8.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/idehjhi/boss_fighter_unblocked.pdfIn PDF document text
    • http://myfavoritesun.xyz/72777570717snr0y.pdfIn PDF document text
    • http://keepqifi.site/cuisinart_ss-700_recallpqm7w.pdfIn PDF document text
    • http://idealica-ituficiale.website/200061685126cdfg.pdfIn PDF document text
    • http://vengriya.space/android_navigation_bar_color_xamarinv4obc.pdfIn PDF document text
    • http://goodshopsales.xyz/marla_maples_when_she_was_youngrgpmd.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/zufosomexixadmbcux.pdfIn PDF document text
    • http://honbiz.pro/44873631557c28s5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc11b73-f4cd-4739-b77d-93cb703779d3/75649175894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96eb3990-ce4b-46ec-8273-c63faf40120f/44656730522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00351d3-a8d4-4325-b5cc-c834d599b84e/talolow.pdfIn PDF document text
    • https://2a984544-7cb8-4a4d-9f60-e686f7994e39.filesusr.com/ugd/1434d3_b62eb1edea954ce480370bba2b78213c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09dac36d-0f90-45bf-93fc-65934117d852/pentair_easytouch_8_wireless_remote.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_3263e15776114319a19389eb65cef3cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f9987e-2fb3-4e32-8060-2d40e2924917/32920837890.pdfIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_f415df7fc54640668decd7323e9a6294.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD276 5448 bytes
SHA-256: fd6f4a119528cb8f2fa56efa5e30f6efa689dcfd168a7667a2b3d115b7d4b3f6
font_01_sfnt_off0000e4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E9 10476 bytes
SHA-256: 40f51d6ab33c32b85d08a94f60271444ab71f8696145f926abbaef487cffb5fc

Open this report in the interactive analyzer, or submit your own file for analysis.