Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7ea4c162f611a8…

MALICIOUS

PDF

76.7 KB Created: 2021-03-14 03:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dab5ff583fd96e847b35b9a614e2c2c4 SHA-1: 99a1ec0dcfb9f1a3a15ec7c9d47e54859885fd75 SHA-256: ae7ea4c162f611a8d4b6917578c9c0a8085901c0caa06ff5a9119c72d1cb8503
186 Risk Score

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 6

  • 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.
  • 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://vilenefex.ru/award?keyword=casas+math+practice+test+pdf PDF link annotation
    • http://changely.club/clasificacin_de_nmeros_ejemplos7849i.pdfIn PDF document text
    • https://fovinekepug.weebly.com/uploads/1/3/4/5/134587719/908474.pdfIn PDF document text
    • https://morapunepa.weebly.com/uploads/1/3/1/6/131606469/sizamigo_fedefik_vokakeziduwudiz.pdfIn PDF document text
    • http://wrinklestiltskin.com/867181740363qk2r.pdfIn PDF document text
    • https://zulevoto.weebly.com/uploads/1/3/2/6/132696122/6353483.pdfIn PDF document text
    • http://likelid.xyz/fifty_shades_of_grey_songs_mp3_download_songsloverypzds.pdfIn PDF document text
    • https://tiwapopo.weebly.com/uploads/1/3/0/7/130739059/4542759.pdfIn PDF document text
    • https://regifedemez.weebly.com/uploads/1/3/1/4/131406591/logevizugo.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/gt6_save_editor0whr1.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/9343024.pdfIn PDF document text
    • http://vanlit.ru/75388264125qxj1l.pdfIn PDF document text
    • http://copyrightproblem.com/2013_dodge_charger_5.7_hemi_0-60m9fpz.pdfIn PDF document text
    • https://cdn.sqhk.co/wukopojenava/SsIiiag/22645292257.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/mivobe.pdfIn PDF document text
    • https://golewobewawir.weebly.com/uploads/1/3/4/3/134350879/zixuzopikirivixijuza.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/65360548000kee04.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/noborojivajuzegu.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/chg0ic6/bhola_baba_song_2018.pdfIn PDF document text
    • https://kebomekol.weebly.com/uploads/1/3/5/3/135349545/xasitewugokemo_lowobazorelow.pdfIn PDF document text
    • https://gafalevomunu.weebly.com/uploads/1/3/4/2/134235362/99c79a8c9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seroritubofa.atwebpages.com/ownership_structure_and_dividend_policy.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/29212273220.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 5268 bytes
SHA-256: bea293dafa7f16bc2ec3f2e8e5b652ec4ac0a987b02be1a72c68eb070532738c
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 11188 bytes
SHA-256: 957384485b7f8f83d22d7b37595a62de3d0a3d1c67bb6dc88bc6772e67981ecf

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