Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdba9e7ee1543e8…

MALICIOUS

PDF

75.5 KB Created: 2021-03-15 15:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6b5bd3aafd7115796e97a49b77014946 SHA-1: 5b6c1077aae50feb6889ca2811a77b3125cb68d2 SHA-256: 0bdba9e7ee1543e8b3de24e9a79bf64343261d3c7c2ba49fe7b2ca752c2ad27a
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/wix?keyword=glencoe+algebra+2+word+problem+practice+answers PDF link annotation
    • http://idclick.cash/bigafikiriruzoxovldff.pdfIn PDF document text
    • http://sehq.xyz/what_is_social_practice_artmiswm.pdfIn PDF document text
    • http://luminar4-download.xyz/44746497451ghqoe.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/beats_studio3_vs_solo_3_for_gym.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/how_do_i_turn_on_my_i_pilot_link_remote.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/atomic_habits_by_james_clear_free_download.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/febuzosijixeg.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/24351370808.pdfIn PDF document text
    • http://tixshopclub.space/how_to_search_using_imagesv2bl5.pdfIn PDF document text
    • http://mareson.getenjoyment.net/libro_apocalipticos_e_integrados.pdfIn PDF document text
    • http://kuworekokinig.medianewsonline.com/rulodoruram.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_03324a6286b34dd58a80d34f8792088e.pdf?index=trueIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/why_does_broiler_work_but_not_bake.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_238c5dcea2704a40a801ab2ea7c84ab5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb14db1-2b7a-45c6-b4de-06ac66540e35/beginners_strength_training_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390ea54b-8627-4ba2-bf66-36a112e0a1d9/losativiwup.pdfIn PDF document text
    • http://novupomajanox.atwebpages.com/vinux.pdfIn PDF document text
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_d79fe112eab84e34944325a0f2fc37cf.pdf?index=trueIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_3bc615d25df544ae9eac9120f95f1b7d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1165627-73d6-47cb-a8b6-44c13f0c60bc/negotiable_instrument_act_1881_section_138_amendment.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/how_to_repair_ice_maker_whirlpool_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99422ef2-ff82-4c25-b2bf-32ec2613998d/anet_a8_vs_ender_3.pdfIn PDF document text
    • http://sopexalibip.onlinewebshop.net/senarax.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 5788 bytes
SHA-256: 23e46ce0420e54338c6646fe0d5a95210577c6186982918831c80ed2647484e5
font_01_sfnt_off0000fd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD36 10312 bytes
SHA-256: 5b151df10487db892815e57a35eabee742fe07e8300990de2cf1708763fab787

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