Malicious PDF — malware analysis report

Static analysis result for SHA-256 7541eced42ec5206…

MALICIOUS

PDF

79.3 KB Created: 2021-02-28 23:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ab3cc36aa4361a28c9b0ab3d424682e3 SHA-1: ad4e369da2010b42a6d18e0633920f9430a1ad02 SHA-256: 7541eced42ec5206d02893721c7d57bd84910426372a3808c451472cf1f04881
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 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/wix?keyword=castle+crusher+unblocked PDF link annotation
    • https://nixejinalir.weebly.com/uploads/1/3/4/3/134321479/xowom.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/24241348266.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/dungeons_and_dragons_books_barnes_and_noble.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468572/normal_60226f6654592.pdfIn PDF document text
    • http://vofufime.mypressonline.com/how_to_connect_comcast_remote_to_rca_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/gimanoretev/rheheji/nedijudunibiwefonajuje.pdfIn PDF document text
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/pojobavuni.pdfIn PDF document text
    • http://zajevafegex.iblogger.org/mil-std-882b_notice_1.pdfIn PDF document text
    • https://cdn.sqhk.co/mokabawimav/bEoE7ie/gaboxelinepa.pdfIn PDF document text
    • http://ridegibulas.22web.org/net_framework_win_10.pdfIn PDF document text
    • https://rigonabex.weebly.com/uploads/1/3/1/4/131483185/1304326.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/wugolijag-sosajitimid-javuninijo.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
    • http://jomozaredid.rf.gd/english_grammar_worksheets_for_grade_10.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/bad_boy_song_free_naa.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/wibumawazi.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/subajelilabanowizasuzuj.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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 5088 bytes
SHA-256: 5e99574d51b4a8ba40e7f66ed33a203bfebb57270c071c1088241e646163cad4
font_01_sfnt_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 11176 bytes
SHA-256: 3721c2b5a078f0a26f6f64d3365279e186cde6f89665de4b3282d761af22bbd3
font_02_sfnt_off000121fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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