Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94592c7a83584c3…

MALICIOUS

PDF

80.0 KB Created: 2021-03-17 10:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 95502278717b34091d7578a4ec9d0c33 SHA-1: 99a03021720fa02d755adf8f08495d4ae6e7f9cc SHA-256: f94592c7a83584c3cdf9412d5048376a41efca8ed1115f66e372cc8c7d7c6958
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to disposable domains and redirectors, indicating a phishing or malware distribution attempt. Heuristics confirm the presence of malicious redirector links and a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to exploit users via a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://crophysi.ru/award?keyword=telecharger+carte+du+monde+pdf In PDF document text
    • http://fruktovik.com/hcf_lcm_maths_genie_answers0tm3j.pdfIn PDF document text
    • https://vidanametok.weebly.com/uploads/1/3/4/3/134318125/6544883.pdfIn PDF document text
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/ditevavasomoxilu.pdfIn PDF document text
    • http://romeoplanet.club/bajefuwofebulexagili74a.pdfIn PDF document text
    • http://hugertely.xyz/programmable_logic_controllers_petruzella_4th_edition_solutionsfptbl.pdfIn PDF document text
    • https://takatika.weebly.com/uploads/1/3/4/6/134605824/9482836.pdfIn PDF document text
    • http://mastera-saydinga.ru/jajabukomiyxg85.pdfIn PDF document text
    • http://filanion.online/what_is_social_networking_in_computerin0mf.pdfIn PDF document text
    • https://gigodetexopisi.weebly.com/uploads/1/3/4/6/134630538/puvogovotiduxejej.pdfIn PDF document text
    • http://shoplus.info/best_free_star_finding_appnqw3h.pdfIn PDF document text
    • http://stikc.xyz/lords_mobile_talent_guide_20191r0ap.pdfIn PDF document text
    • http://esportzmlevent.com/wogomejepofug7r3r4.pdfIn PDF document text
    • http://shopmzm.site/ada_guidelines_2018_hba1cwcj4l.pdfIn PDF document text
    • https://ponozivodu.weebly.com/uploads/1/3/0/7/130775347/4762118.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/32591090551cpv61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74193f73-2db4-46d9-98b6-ee17d994008c/the_plague_albert_camus_full_movie_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b949ac-7216-4cff-8297-75a91cb0cb64/vuxureboza.pdfIn PDF document text
    • http://kalidoro.epizy.com/78275058993.pdfIn PDF document text
    • http://wotixebapaxuwug.rf.gd/66347990760.pdfIn PDF document text
    • http://todojenosefotaz.epizy.com/cdr_format_online_converter.pdfIn PDF document text
    • http://xaxevuvu.epizy.com/upgrade_32_bit_to_64_bit_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd62fdc9-225d-4c07-92d6-5644c6759b2c/pufefip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff763fd5-8961-44e3-9a9c-4cfee65a2b19/98354476364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5caa5720-ceda-475c-889a-d58174222fcb/72441320149.pdfIn PDF document text
    • http://nuxumejaxumem.epizy.com/matosafus.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_off0000f5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F8 5340 bytes
SHA-256: 5732715cdf995f30dd2ffc9e4c5c4a227631a63074edad1c621ce6168e4fd0a0
font_01_sfnt_off000107f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 13344 bytes
SHA-256: 4344979a09e30aa59f319dbc57748878cb351444ae4216f09281d3ed87a5a9c2