Malicious PDF — malware analysis report

Static analysis result for SHA-256 813db5d98c1ef22a…

MALICIOUS

PDF

97.8 KB Created: 2021-05-03 21:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 16d7f222a3e448df5bf96d1653ac2c8f SHA-1: 90a72f69999cf812d6ab66415541582bf4fb5862 SHA-256: 813db5d98c1ef22ac0f5a3214684cf4169e1c56ae0b4164dab28348f5b971bbc
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 0.9995

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://fokemale.ru/strik?utm_term=is+rise+of+the+shield+hero+finished PDF link annotation
    • http://mawosatejojeka.sportsontheweb.net/zifanaxefaporonutuvopiw.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/rjayjaa/como_recargar_tarjeta_ais_desde_italia.pdfIn PDF document text
    • http://ropiwijubasa.22web.org/43982116908.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/5317106.pdfIn PDF document text
    • https://pafirolexorawu.weebly.com/uploads/1/3/4/6/134612045/rutipo.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/bgchcie/24192738427.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/paradise_lost_book_9_line_by_line_translation.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/multi_code_receiver_1090.pdfIn PDF document text
    • https://sozazoje.weebly.com/uploads/1/3/1/1/131164180/4236527.pdfIn PDF document text
    • http://golixudib.mypressonline.com/83433723496.pdfIn PDF document text
    • https://vugevosuza.weebly.com/uploads/1/3/5/3/135328642/fisejabi-banemig.pdfIn PDF document text
    • https://cdn.sqhk.co/senaveduwiz/eCuheib/twitter_video_on_iphone_app.pdfIn PDF document text
    • https://tosofovopige.weebly.com/uploads/1/3/3/9/133998067/d3446b4.pdfIn PDF document text
    • https://cdn.sqhk.co/gikasiful/dhis4hi/plague_inc_apk_hack_1._15._3.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/0dbabfa8-60bb-468c-ad04-46ff9ca07c0f/less_than_zero_book_review_ny_times.pdfIn PDF document text
    • http://gurerixid.rf.gd/carmen_habanera_noten.pdfIn PDF document text
    • http://piwobakipefa.rf.gd/vans_old_skool_shoes_white_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3896e8c0-9345-49cd-9a33-f26c949ab6ac/the_trials_of_apollo_summary_sparknotes.pdfIn PDF document text
    • http://xuwanozofugis.epizy.com/aviva_asia_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820d5eec-5d20-44e8-8171-a41ee7f39ebe/on_magnetic_disks_files_can_be_organized_in_one_of_three_ways.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_off000117d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D8 5836 bytes
SHA-256: 369eecda3ccd0b9a5a2fc644c3af47e825916d9fab5640841179665cae459035
font_01_sfnt_off00012c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C10 4724 bytes
SHA-256: 1743f264dc544726b72eae78d66fe1ad5a5c766a289ba4a8af7e617c51b64f29
font_02_sfnt_off00013c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C15 11880 bytes
SHA-256: ea9c59e28a0252fb15a08c2ed103828f7c13bc3cf7929c5e401491459ee09473
font_03_sfnt_off00016430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16430 16132 bytes
SHA-256: 4f6d6443d667672870c38ce4e1d364e29e61a0df6fd2d8217a47270b9fff04c9

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