Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abcc7f2179109d0…

MALICIOUS

PDF

91.0 KB Created: 2021-03-20 05:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9d61dddde0d3a5574a1aedbd0b0f9ff0 SHA-1: 247359125c8498293f06a6a3d3873b2ae86675dd SHA-256: 0abcc7f2179109d08f39e3023ddfd089aeb0b17390fda0e9850b0ee2c931f8bc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and employing UTM parameters, indicative of a phishing or spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting, likely to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://jacksth.ru/strik?utm_term=mass+effect+3+tali+romance+guide PDF link annotation
    • http://apeech.ru/84434448854qgtex.pdfIn PDF document text
    • http://nopatoveji.22web.org/gugudebobewuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_603a138890eda.pdfIn PDF document text
    • http://help-business-media.com/wanepqoptk.pdfIn PDF document text
    • http://doorstepcomputers.com/us_army_reserve_units_in_west_virginia1h5lt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5fdc7c4174bef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5fd61de3e4978.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478685/normal_6004be0f32571.pdfIn PDF document text
    • http://biweekamnf.com/sozodobk9zg.pdfIn PDF document text
    • https://davijoxo.weebly.com/uploads/1/3/4/3/134357566/zumipevelefew.pdfIn PDF document text
    • https://buxenawemino.weebly.com/uploads/1/3/4/5/134581697/newovibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_5fd63b186ab3d.pdfIn PDF document text
    • https://walagewujiw.weebly.com/uploads/1/3/0/9/130968979/suduwevuwege.pdfIn PDF document text
    • https://xevupuwikuguv.weebly.com/uploads/1/3/0/8/130814145/vilepudodedil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478685/normal_600aa698569b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5fc58be351733.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/15618987093jtgyu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajamuviw.epizy.com/satugibetu.pdfIn PDF document text
    • http://befadiw.rf.gd/criminal_law_act_south_africa.pdfIn PDF document text
    • http://xokofenox.epizy.com/css_grid_layout_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/2020_amc_results.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/the_2015_ageing_report_european_economy.pdfIn PDF document text
    • http://niburevukezuxa.epizy.com/78432290459.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_off000127a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A8 5512 bytes
SHA-256: b812cb2c037aebd753bd0bf71fc432a68b84db3e677c517e1218064f24478b06
font_01_sfnt_off00013a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A52 10660 bytes
SHA-256: 2e38fe53f709265b202ae68d8a0d739174e116fae17a4822d592869662abff19

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