Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5598844c6c9df87…

MALICIOUS

PDF

91.5 KB Created: 2020-12-21 19:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cd798bc4200df09f5d477865cc74e054 SHA-1: 7abc28e0a33e51b1020f4e50341724fdedead187 SHA-256: d5598844c6c9df872b87c22c38b35654bbe67213d542fbcfee60578c4244cc7b
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/strik?utm_term=rebuilding+together+pittsburgh+jobs PDF link annotation
    • https://kumupesefutevun.weebly.com/uploads/1/3/4/4/134463509/xetusokoremumaludi.pdfIn PDF document text
    • https://wixevilit.weebly.com/uploads/1/3/4/8/134873569/jugalawinile_kurilowijo_nupofosufexinup.pdfIn PDF document text
    • https://lureriwoxefewu.weebly.com/uploads/1/3/4/5/134590368/wipexokeludixow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_5fda60b96a8b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5fda676cc833d.pdfIn PDF document text
    • https://pebetojakudasud.weebly.com/uploads/1/3/4/8/134879391/b303fa650f.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/5021560.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/xuwenu_lutumufoje_tivobozedu_livikefirelemav.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://s3.amazonaws.com/zebarufuridorur/78482198163.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54ad5cd1e280355f12c83/t/5fd0c135125f6a657a546176/1607516470219/voltage_drop_through_resistors_in_series.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/25406319347.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55b95df132613bbdb4396/t/5fc9a0d72ae1264a038cfc3c/1607049431494/1280030133.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/reviwikeweko.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/terraria_android_apk_1.4.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 5116 bytes
SHA-256: c4da8f985f3b2c729592194666d1f9da0c7aa7a925458425fd111d5778abdb9c
font_01_sfnt_off00012019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12019 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00012b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7C 11356 bytes
SHA-256: 1f1d2dc6ce2f207e23ff13e8a59e892048b1227bb12423e84942fea1fc9ab0ac
font_03_sfnt_off00015239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15239 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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