Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f13f299c14e5387…

MALICIOUS

PDF

81.5 KB Created: 2021-03-22 10:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 24bb16b49dadd2cc5a5ffe23519e964d SHA-1: b12bd0aa325e0041e8b21c53ce20a4c8cda8fad6 SHA-256: 2f13f299c14e5387081ec6b5f6ff7d676f1a56ce6983f966c0c6d44853592c38
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious content. The primary lure, "grand summoners tier list 2019 november", is used to disguise the malicious intent. ClamAV detection and ML classification strongly indicate this PDF is malicious, likely a phishing or malware distribution tool.

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/wix?keyword=grand+summoners+tier+list+2019+november PDF link annotation
    • https://cdn.sqhk.co/pimidima/gghdhfU/london_road_with_famous_zebra_crossing_crossword.pdfIn PDF document text
    • https://rusaxexuratibu.weebly.com/uploads/1/3/2/6/132680860/kemefaroda.pdfIn PDF document text
    • https://cdn.sqhk.co/monubinejon/gew3oid/swipe_basketball_mod_apk.pdfIn PDF document text
    • https://wibawamo.weebly.com/uploads/1/3/1/3/131383294/xozam_desosekomu_jolovejomalo_gafesoju.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/iabXNiL/my_boy_gba_emulator_full_apk_free_download.pdfIn PDF document text
    • https://zafuzumu.weebly.com/uploads/1/3/4/6/134674349/xisofoxaxosobit_pitenemuva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sebunuzu/osha_safety_standards_for_conveyor.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_675978ab15aa44d08267da1c2f112504.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/ms_word_shortcut_keys_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/dell_studio_1737_upgrade_ram.pdfIn PDF document text
    • https://3d636ecf-b5c4-4691-845c-2d501a7a8090.filesusr.com/ugd/b09df1_1303b0d60aa84a07b3630dbff0f3b4ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kabisebax/probationary_period_review_form.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/nys_dmv_enhanced_drivers_license_renewal.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/safety_data_sheet_defined.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_1e88dcc86fd94d53b1dbcd3c7af7789f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/banula/wutasekajovetatevegerek.pdfIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_ef550a0d00844578ac16fd233490177b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/73874040086.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/above_all_crucified_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/the_secret_by_rhonda_byrne_audiobook_mp3_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/business_strategic_information_systems_management.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_6eeaa8b921684747894dcf315d9908c4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 5564 bytes
SHA-256: 4af64c541c30f2038f6320b2182e196dbef76502c51c4e7562ccc10db05ff144
font_01_sfnt_off0001048f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048F 11924 bytes
SHA-256: 23e12dce227b29f224f588ccbb4c9fcb1c7df79bf1153d61b1f0d770da97b087
font_02_sfnt_off00012a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A82 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3