Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25d06045d617e2c…

MALICIOUS

PDF

78.0 KB Created: 2021-04-29 10:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 858e59325079ad625bdbcc468382b5f0 SHA-1: 96cacc9d1dcb1f3c93532b77ad638104205b763a SHA-256: e25d06045d617e2c83dc64650fc7cc3cba678af22ee8445c2bf69ff38be3486c
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://dafemum.ru/strik?utm_term=common+problems+with+ford+focus+2012 PDF link annotation
    • http://neo-tp.ru/how_to_remove_dyson_brush_head_dc25fujb1.pdfIn PDF document text
    • https://kapuwibipu.weebly.com/uploads/1/3/0/9/130969563/1651489.pdfIn PDF document text
    • http://microdigitalmeter.xyz/22113873226110ep.pdfIn PDF document text
    • https://fogojokiverowur.weebly.com/uploads/1/3/0/9/130969702/pifuka-volixixifawe.pdfIn PDF document text
    • http://1fps.ru/getuzakuregusiroravasetaj7eei.pdfIn PDF document text
    • http://bilet-pdd.site/raw_gnss_measurements_from_android_tutorialah1tz.pdfIn PDF document text
    • http://kinikapiv.22web.org/parasitic_nematodes.pdfIn PDF document text
    • https://wukejesinoguret.weebly.com/uploads/1/3/4/1/134131703/5095dfcb53.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/widetunipet/84984843505.pdfIn PDF document text
    • http://pugetuwozijeso.rf.gd/57916583681.pdfIn PDF document text
    • http://weniboduxinux.epizy.com/budget_speech_2020_highlights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c32261-8ec7-4dca-a0eb-98836bb4cd06/1012873046.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/what_is_credit_memo_on_bank_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3619591-bd34-4404-adb4-3a1119ed0ed6/53992682434.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/metemamuzokekejuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b033f18-95b0-4420-a887-04ba93268cf3/23502839953.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/formation_bonnes_pratiques_de_fabrication_cosmtiques.pdfIn PDF document text
    • http://ribafaga.rf.gd/naminawuduzupokasetimeto.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/rubozobilerisupirelojel.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_off0000f20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 5648 bytes
SHA-256: de9912ded6920b22ae9685d89d0a53d9ecf3f1e36fb7622d892a8b8febc72aa0
font_01_sfnt_off00010525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 11140 bytes
SHA-256: e683c7b09cd115f6d76fe336cb955eec0da9ff2e940da66fa4708248808c6e13

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