Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d2e2447c25a25f…

MALICIOUS

PDF

73.4 KB Created: 2020-12-16 13:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d93631bcae43fcb470953dd596ea454e SHA-1: 7d187f9cda2f907ef1957fb5e1ac2f7697b3afc2 SHA-256: 59d2e2447c25a25fac1e497e1f7d563c4d1f7f456af8051c6ed33249d3e412a2
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing operation. The embedded URLs point to potentially malicious domains, and the document body, though obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, often used to create fake document pages for SEO spam or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=acog+guidelines+endometrial+hyperplasia PDF link annotation
    • https://tasozowi.weebly.com/uploads/1/3/4/3/134315408/nuzajotem.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/gujobewalanenemef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f92c295c3718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481839/normal_5fbaab0ed39c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456140/normal_5fb79d206d89b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485153/normal_5fa9d0734d18b.pdfIn PDF document text
    • https://dafebifu.weebly.com/uploads/1/3/4/3/134399244/3bf93b.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/livivuvuwugeb/fipevuwakokifugezixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35bbf0b-4610-4e9f-bb23-4e8dbecb979d/6773137342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7031366-7594-4d9f-a44e-889f08993db1/macbook_air_manual_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52eefb15-d254-4b35-bbf9-f59140749652/sport_games_unblocked.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc350c32e537a05ef18a0f9/t/5fcf04cd01eaf4591e201d60/1607402706405/coupons_for_groupon_hotels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d900e5-df5b-4f33-b01a-d0c14c760ee1/one_direction_four_album_download_de.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18aea07-32a3-4d6e-951c-f68f4330522c/81110213557.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc107c868612547ed5eda4d/t/5fc333a87acac6192a28af26/1606628266499/lalojosegagapimonuga.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/abhiyum_naanum_cut_songs_free.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_off0000dffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFD 5576 bytes
SHA-256: 6af49bbf070a2f327c77ca62b18f17e574f4b892734acef9209ea57bcf2a4e77
font_01_sfnt_off0000f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 10940 bytes
SHA-256: b8f9e1f63774a2424fe98901244403d9d17aec71d928213797d02b65bbc7777c

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