Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a38301d08d082d1…

MALICIOUS

PDF

81.9 KB Created: 2021-03-05 23:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 73692949c5d221d808734f71fe87c285 SHA-1: 1fb5ffc60e89101258feb8ea79ee7c0b14ff3c7c SHA-256: 8a38301d08d082d1a11c9244a36dd913bfbd8cd5af91367a12ddcf06561e81e2
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 0.9997

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/wix?keyword=write+your+answer+in+terms+of+pi+calculator PDF link annotation
    • http://pycnidwzxc.info/azure_pricing_spreadsheetw5513.pdfIn PDF document text
    • http://umniashka.ru/qu_es_una_funcinamdkr.pdfIn PDF document text
    • http://silver35.ru/gre_practice_reading_comprehension81tdh.pdfIn PDF document text
    • http://beach-fruit.fun/eminem_the_real_slim_shady_mp3e1vbe.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/dejubizetatim.pdfIn PDF document text
    • http://mifvideo.space/dr_greger_how_not_to_dieg80uh.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/where_are_ford_mustangs_manufactured.pdfIn PDF document text
    • http://tryse.xyz/pack_n_play_sheets_quiltedjtao6.pdfIn PDF document text
    • http://uspex22.online/95364810007p90fi.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/74084884894.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/f7080a16-6aab-4376-8006-e059075bad37/my_power_inverter_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c110ed-c132-4abc-8253-c3de52d39068/dcs_world_su25t_weapons_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31c9257-c81e-485f-8335-5b22cf8aa247/opening_in_paint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4b10b9f-456a-4075-a7cb-56fc8ccaa799/58200621668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc2d9c6-7899-41bb-a194-43220dcb3ea5/best_small_dvd_player_for_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/power_bi_custom_color_template.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/anaconda_2_full_movie_hd_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/94053763986.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/susigokixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935d5db9-f385-42d3-92f2-a2c49dc63f76/fidasuzuwe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 5368 bytes
SHA-256: b1eb0399f64a91ef26d743748c438e3ce38a84b694a2e6243c077f95bdc64d15
font_01_sfnt_off00010008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10008 10900 bytes
SHA-256: 0daf770ca4117aaad5c8dfc6af76958628705d1652a6a670edb3e9797926f8c4
font_02_sfnt_off00012506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12506 16108 bytes
SHA-256: cd248ddf65cba76856a38788c5be45400c6993d78f7d93e85fcb70b38d74b54a

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