Malicious PDF — malware analysis report

Static analysis result for SHA-256 418232e3074958f2…

MALICIOUS

PDF

86.3 KB Created: 2021-04-04 05:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: b260265b38aac3ba1371e53d472b1fc6 SHA-1: 25ba6218899580f8655d661c4447c4a3bbed5302 SHA-256: 418232e3074958f2ceb95279aea86e6404920747816db6dff02da06b857acff5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or scam attempt. It contains a large number of external links, many of which are to PDF files, suggesting a link farm or redirection mechanism. The document body is heavily obfuscated, but the presence of external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest the intent is to drive traffic to malicious or deceptive websites.

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://kuzutuzo.ru/123?utm_term=nfl+expert+picks+week+11+bleacher+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387033/normal_600cdf018254f.pdfIn PDF document text
    • https://dirarogevuku.weebly.com/uploads/1/3/5/3/135351224/jiboluzidobi_buvuwilu_fefedigaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_602b4f0a3578e.pdfIn PDF document text
    • https://duxegebipuvakij.weebly.com/uploads/1/3/4/0/134095857/8720f6a891cbb5a.pdfIn PDF document text
    • https://vexalujonesudu.weebly.com/uploads/1/3/4/7/134738084/refekede.pdfIn PDF document text
    • https://mapijilut.weebly.com/uploads/1/3/0/8/130873952/5b2fae09599.pdfIn PDF document text
    • https://lidugozomamaxo.weebly.com/uploads/1/3/1/6/131606349/3c5f2cb5f675d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377902/normal_5ffda1fed9e02.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/tuvuxumuvovi-nebixorupive.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/gonima/pameboxemogisasivus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c2c6d5-2d87-4f43-a060-b812cde17dfb/71787464055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20ab3d65-b09b-4d66-baf5-75badca7790a/weekly_weight_loss_chart_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/maxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cefbb203-2b02-4332-bb4a-88bbaeb5a81d/how_to_catch_him_and_keep_him.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/lazanopenifixitanen.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/attack_on_titan_season_3_ending_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0333eec2-ec96-4917-bb63-ffa648362447/xuramidixabopor.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/invisible_man_original_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cce8c9f-17c1-4909-9481-922a59072bbf/the_treaty_of_guadalupe_hidalgo_resulted_in_brainly.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/11563132134.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_off000115d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D3 5488 bytes
SHA-256: a2e93968f3146b74b619816924416f5d27842ec92ecacb9b167921707b73b0e0
font_01_sfnt_off0001289f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289F 10380 bytes
SHA-256: 9bc700503bdcc5cccf37ef7d91028661461f5a0da9e450c50fc2931c92359781

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