Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8646e9611ac0261…

MALICIOUS

PDF

81.6 KB Created: 2021-03-17 00:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 42a3ed89f4021bff580d984f5e4a4e3d SHA-1: 5e017e07d26f2239c70424e8b20fb18c06aad1b7 SHA-256: f8646e9611ac0261330806beb0936d376b352e57b58a05271c932be922f0978c
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://zajinet.ru/wix?keyword=form+space+and+order+pdf+free+download PDF link annotation
    • https://ruliduwaj.weebly.com/uploads/1/3/4/0/134016670/voroxil.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/gdRhbhf/rafakove.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/6b98c3bfdf.pdfIn PDF document text
    • https://cdn.sqhk.co/jefigujaxev/hefcJjc/40453852609.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/pjhghad/barunotigepovibata.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/dYkgggc/best_galaxy_s7_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rujamuzizogo/1Qfjdig/word_blitz_game.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/ickcvJe/zisoradi.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/iljdeii/ice_climbing_hammer.pdfIn PDF document text
    • https://cdn.sqhk.co/xojugako/rnAruje/lyca_wifi_hotspot.pdfIn PDF document text
    • https://tamexixufose.weebly.com/uploads/1/3/0/7/130739892/44d83f.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxexaxi/5iijifh/shareit_apk_mod_no_ads.pdfIn PDF document text
    • http://front-glass.website/new_games_2020_online_free_play9adzw.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/ieLZgdg/impulse_response_guitar_cabinet.pdfIn PDF document text
    • http://opssmall.space/xosuwasefamofelagirilusegi3wgl.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/Wsgh0ib/hide_and_seek_among_us_ssundee.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://uploads.strikinglycdn.com/files/2d7d785f-b6d3-48b9-94d9-0095630460bc/41139417613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee85cda9-0fdf-4237-afd1-71eb35b6ca34/22601070996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8965962f-6792-4830-8624-96eaeac36876/he_comes_next_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/017956c7-f22c-49d3-a844-2a774b4eaa6b/72928526254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c481445-f650-45d6-823f-81fc7d3749ae/walking_disaster_sum_41_chords.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 5008 bytes
SHA-256: 472f7120b3eb4e5ae22b8d8b055ca2ba518cf2030464373032e9da912c565d51
font_01_sfnt_off0001060e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 10664 bytes
SHA-256: 399ca5813f325e80433fbeb3d977747daeb4eee817ecd411100a7ead575aab27
font_02_sfnt_off00012a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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