Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c78e6ac0a4b28b…

MALICIOUS

PDF

84.7 KB Created: 2021-02-23 23:15:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 06da0a89d169f421622907834552398f SHA-1: 7303143a313827905728aa473711299207216386 SHA-256: 78c78e6ac0a4b28b12d96fdcdc61b997befca0ecc6b4484d7ed7ab34507a21c4
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 0.9989

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://leonvi.ru/strik?utm_term=como+crear+un+archivo+en+linux+desde+la+terminal PDF link annotation
    • https://cdn.sqhk.co/tarolaser/jgjdCLb/history_channel_app_youtube_tv.pdfIn PDF document text
    • http://cccckkkkkdd.space/juvobesixi1lkjc.pdfIn PDF document text
    • http://wegansit.space/sportcraft_tx400_treadmill_used_price1hlw4.pdfIn PDF document text
    • https://nunajamedagafep.weebly.com/uploads/1/3/5/3/135325778/9261397.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/f9eu0jZ/lanitidilatusafeku.pdfIn PDF document text
    • http://idealica-ituficiale.website/15904692991vexea.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/BJ2ia3E/13174740457.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482847/normal_5fce795eacdd4.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/5017687.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5ff6130af2713.pdfIn PDF document text
    • https://bazodezivif.weebly.com/uploads/1/3/6/0/136088162/698302.pdfIn PDF document text
    • https://fupobemoxu.weebly.com/uploads/1/3/4/6/134669325/pesusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_5fd10cd51e138.pdfIn PDF document text
    • http://vidclips.design/kajujodanoxipiburivupugadqb311.pdfIn PDF document text
    • https://pafetujesotizi.weebly.com/uploads/1/3/5/3/135348857/velopole.pdfIn PDF document text
    • http://nokekowukubu.22web.org/brawl_stars_apk_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/agdYKjf/kutemoriwewelowojefokujiz.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://lelekon.epizy.com/mafatusimageta.pdfIn PDF document text
    • http://nixuverojezuluz.epizy.com/12025901487.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/which_is_better_apple_or_orange.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA17 3120 bytes
SHA-256: 2e316514836a98f4fcf368d4045b5e3ff505fde1b021feeaa3bfee56d2e4ea70
font_01_sfnt_off0000e540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 5212 bytes
SHA-256: 151019cf592045e834ca843a96fc36d44a002c46525740df1b6118e256e18539
font_02_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 12272 bytes
SHA-256: 74690e15910d417111e69537358c046ab0f399d550cfd137ae1734fc58afdcc0
font_03_sfnt_off00011edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDC 16160 bytes
SHA-256: 7e63eb3bed9c4ceaf47e86587cf77a789dba98dd2b4db382f0c7f052a0aeb8ce
font_04_sfnt_off000133d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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