Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20ccbc41c5ba330…

MALICIOUS

PDF

78.0 KB Created: 2020-12-14 20:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c438a1e08d6cc79cfd1da54f67bdad4a SHA-1: 476986c3ec65daf136d655374552029ee6a50be2 SHA-256: e20ccbc41c5ba3301aa2e5e87a87b366b1b12d4aff3d1688b704b2cbaa362957
214 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=global+building+information+modelling+market In PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/sigunis.pdfIn PDF document text
    • https://dalagusixofu.weebly.com/uploads/1/3/4/8/134853238/05eb2cdf.pdfIn PDF document text
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/kuzizokefid.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://static1.squarespace.com/static/5fc1772f116eb00e3c4ff943/t/5fd0252d26d54b3c06c81868/1607476525346/mosuporezerimizu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6bd3398ff75152e0f70/t/5fce0c4874a40730fbbf40b2/1607339081246/mobile_legends_bang_bang_diamond_hack_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc338c4be9b69395119d659/t/5fcf0927faf0bc04d1c318ea/1607403815773/38128281603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b83066-2f8b-49d4-af6e-678578caff07/homelite_super_xl_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54343116eb00e3c68afb8/t/5fd689d8acac596b0cc113b9/1607895512375/battery_percentage_apk_apps.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10a34403f5353fd968438/t/5fc4ee9cbc819f1cf4735260/1606741660951/chronicles_of_darkness_rulebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e47d739-01c0-4350-a173-373a9de538dd/41784734580.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe36bbbc819f1cf4a38c8f/1606301373278/waparesomajifenuzimimot.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24C 5168 bytes
SHA-256: 19b0df7b91e43a02d726a3b5eb22265c07c31850dc7a3ff4601437e2b4158f57
font_01_sfnt_off0000e3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C8 10044 bytes
SHA-256: f0b7ecbb8ede34f94c2543e7af3a6c56b6867dbb15b1f29494114561d05f41e0
font_02_sfnt_off000105ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 16076 bytes
SHA-256: d4a88a3a8205faafa880075823aabd831252e3f8020b7d06daf30e92536d8b86
font_03_sfnt_off00011a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A94 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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