Malicious PDF — malware analysis report

Static analysis result for SHA-256 88181df52a6065f1…

MALICIOUS

PDF

78.5 KB Created: 2021-02-21 08:37:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cd4c1b836d3406f92678b3dd81685a46 SHA-1: 1214bda3e166142e4723427ab50be206561c510d SHA-256: 88181df52a6065f14ae0d1d0b620df73ee0f8234698e98c63dec8b832dd08bb7
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 0.9998

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://jottigo.ru/wix?keyword=ev3+line+follower PDF link annotation
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/pitikazaruw.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/3d0e866.pdfIn PDF document text
    • https://nojemalof.weebly.com/uploads/1/3/0/8/130873850/kalowafira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_6027cad4ce0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450251/normal_6021ba1924b92.pdfIn PDF document text
    • http://klokisik.space/is_magic_tree_house_science_fictionwxdgz.pdfIn PDF document text
    • https://rugabefek.weebly.com/uploads/1/3/0/7/130775918/8845899.pdfIn PDF document text
    • http://velesvoyage.ru/will_colleges_reopen_in_january_2021_ukb7tc2.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/vuvirilikebaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5fd96190398b2.pdfIn PDF document text
    • https://fepepifufom.weebly.com/uploads/1/3/1/8/131872298/guxenuwitun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/36074106903.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/centrifugal_water_pump_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/sky_map_tonight_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/zosenetopetiwezuvivutidol.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 4648 bytes
SHA-256: 0bd5ea87506bdbb66723e1c5e1d5af89647dd8e86c3bb551399423d3889fb93f
font_01_sfnt_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 11868 bytes
SHA-256: bfbce89b47083faf9b18808bc11e8c21f2532f865c08f683937a00c4dd7967d8

Open this report in the interactive analyzer, or submit your own file for analysis.