Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e34b223e703526…

MALICIOUS

PDF

70.1 KB Created: 2021-01-12 05:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ab783147f2eeb343d8e7d2a6df91abcd SHA-1: 9d6a86ea7a7b1fcf7623e6205b555c98e53c0052 SHA-256: 89e34b223e703526691d34dbb413ab58dd7663e30e0a7ff10283df8de277e40b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and a large number of other PDF files, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=keurig+coffee+maker+descale+instructions In PDF document text
    • https://site-1174999.mozfiles.com/files/1174999/moneygram_money_order_fill_out.pdfIn PDF document text
    • https://vogavowaxataner.weebly.com/uploads/1/3/4/2/134266619/7197829.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/ragabelata-zetamu.pdfIn PDF document text
    • https://fabexitib.weebly.com/uploads/1/3/4/1/134109013/dekusuvuriselive.pdfIn PDF document text
    • https://rapusixub.weebly.com/uploads/1/3/4/6/134631860/ca9dc80577b9.pdfIn PDF document text
    • https://site-1178312.mozfiles.com/files/1178312/titan_quest_anniversary_edition_atlantis_gameplay_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f877566229fd.pdfIn PDF document text
    • https://bukekumagisalej.weebly.com/uploads/1/3/5/3/135333054/4993633.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/c9171fb6bf74.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/tizadoma-ninimi-xilaregemadix.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/mekonulegipero/bavinck_reformed_dogmatics.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/villain_bengali_movie_all_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/71135006050.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/tamil_movie_video_songs_2019_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/amlodipine_norvasc_davis_drug_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/57524253743.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_off0000d4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 5376 bytes
SHA-256: b177500787d7e8ab5063839e4e00dea367a37ef902f64193b9856978ad103e6c
font_01_sfnt_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 10444 bytes
SHA-256: 52e990dea4b152632123307376fbc21dc2862f7161d46fb51128f60723272d0f

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