Malicious PDF — malware analysis report

Static analysis result for SHA-256 4642b07e8c7f09b3…

MALICIOUS

PDF

69.4 KB Created: 2020-12-03 12:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 203b98618a5ea1bc06d33b43ec249be9 SHA-1: 96b300f25e3b8716088428f31c7c7c94bb107169 SHA-256: 4642b07e8c7f09b307684f031ea7d17688db46830f6c2bf4f300a0d7c05535e8
164 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 and presents a deceptive download button. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=full+marks+tamil+guide+class+9+pdf PDF link annotation
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/wujedifewavojosawen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_5fc172869940d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453885/normal_5fb61bd420a82.pdfIn PDF document text
    • https://vapuwunenerupig.weebly.com/uploads/1/3/4/7/134727873/934279.pdfIn PDF document text
    • https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/3494900.pdfIn PDF document text
    • https://dezekebewefe.weebly.com/uploads/1/3/4/7/134731304/xezopuv_pijebogiletogi_mewolivofeg_gixemunot.pdfIn PDF document text
    • https://luxexawasoju.weebly.com/uploads/1/3/4/1/134109261/najagu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fewunadupop/46499870373.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/to_agreeance_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/balkanski_spijun_lektira.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/biwezikisizikij.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/30346554648.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/orioles_2020_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/fantasy_creatures_word_whizzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/lewonopodavalevulolilamox.pdfIn PDF document text
    • https://s3.amazonaws.com/tifemuma/tusekuduzofodu.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C8 5316 bytes
SHA-256: 188f228097c9f6c29ade428f5e95bb73d863c271bd91d9eee492a863f55b6e96
font_01_sfnt_off0000c7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D9 3556 bytes
SHA-256: ea0d170f5a00c85b5660654be7c5c1035f98f173c95e32ef75bfd75945e7542c
font_02_sfnt_off0000d568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD568 10804 bytes
SHA-256: f720d2b37acbaecead5bf53eb80f1b38353f2e152f69404ca03f15d61f1d37e9
font_03_sfnt_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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