Malicious PDF — malware analysis report

Static analysis result for SHA-256 05431a6c4c18d18e…

MALICIOUS

PDF

123.5 KB Created: 2020-12-03 14:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c4d9a86a46105db918be90815408f8c0 SHA-1: 97b6ebd253865846f853ad6273384ca6363a7509 SHA-256: 05431a6c4c18d18e30fad106a24a6541b684621bbfa742133c79551c5158e912
156 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 0.9993

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 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.
  • 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://traffnew.ru/123?utm_term=discord+spam+bot+invite+link PDF link annotation
    • https://kovumagamu.weebly.com/uploads/1/3/4/5/134578336/5238203.pdfIn PDF document text
    • https://niwurakoj.weebly.com/uploads/1/3/4/5/134588258/9db1b3667df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc29c05a3bf4b14abb4035c/t/5fc5ac902dd96f5918b1a8c5/1606790288574/36930384120.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0ab761e25426e100220c/1606290103195/kenmore_elite_microwave_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/resafatus.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/passport_application_form_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1923f7819f6264ddadc8/1606228260364/volos_guide_to_cormyr.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/gupozetirok.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/apple_music_apk_4pda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc191a61452f90b7fea0e1e/t/5fc2e5855147b1480492d359/1606608262272/mirupumujamobuxibuwixewek.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/53797258833.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/medical_answering_services_buffalo_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/keynote_animation_templates.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd3cd46e7cdf75b9345dea/1606237399173/circle_theorem_proofs_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/parking_building_floor_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/66362573161.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001701a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1701A 6832 bytes
SHA-256: 443b2fb6404e8b5f9ae8974b816aa80c47dea8ee905b4ddefff3ad4d9ea38d30
font_01_sfnt_off00018168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18168 5480 bytes
SHA-256: d9d4aa3500a09a3adef0f50c9fc0be602ebd7b0732a80391090562076aaa07d0
font_02_sfnt_off000193f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193F6 2428 bytes
SHA-256: f12235970304bd469e59a107ea997914daef94caecc4f7a38d1f83f3171a9e09
font_03_sfnt_off00019e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E54 12908 bytes
SHA-256: da2f52a91639e3382903425139af715c016e2a6fa1a2362c35bcb5c114898f8f
font_04_sfnt_off0001c97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C97A 16500 bytes
SHA-256: f544c19de5539de22368242e65aaefd732f1316b62f8717ee8c5d86634f27aeb

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