Malicious PDF — malware analysis report

Static analysis result for SHA-256 719adb8e382e9eab…

MALICIOUS

PDF

72.6 KB Created: 2021-02-10 13:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1bd5b9be40253d95fc9253a705e75873 SHA-1: a87d0f6e9b2cde6c13821e56709521c293204b72 SHA-256: 719adb8e382e9eabcd099f8e6ed53a53f7c18ebb02dba6084f5d0101958af97f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs are indicative of a spearphishing attachment, likely designed to redirect users to malicious sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wb?keyword=authoring%20a%20phd%20dunleavy%20pdf PDF link annotation
    • http://apparently-home.com/las_reformas_borbonicas_en_el_peru3nm4i.pdfIn PDF document text
    • http://gezawazerige.iblogger.org/crosswords_answers_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_60041ec0145d7.pdfIn PDF document text
    • http://infokurs.design/98221063623fy4wm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467286/normal_5fc86d0e7f077.pdfIn PDF document text
    • https://rekepepijo.weebly.com/uploads/1/3/4/0/134018016/5139079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463010/normal_600e86ae48a1d.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/gibef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368492/normal_600917eb9edfc.pdfIn PDF document text
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/xuwatexaboma-simugajej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392470/normal_6008b5a410682.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/xijatemakusir.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/tosevud/asean_integration_advantages_and_disadvantages.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/26642227039.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/indian_bodybuilder_photo_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/aerobic_dance_songs_free.pdfIn PDF document text
    • http://pajamubo.rf.gd/xubupo.pdfIn PDF document text
    • http://fofifalog.rf.gd/95686266703.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_off0000e026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE026 5276 bytes
SHA-256: 9dc6f4d8fe54a3a7ace8c696756ac2638f0c0fd1c7343592e7e6460440476b24
font_01_sfnt_off0000f227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 10132 bytes
SHA-256: c0fb20e3cec2ea84a805db04bf9f1906260f94ad827f8c198020a1da214bbce1

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