Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e35680a66dea875…

MALICIOUS

PDF

74.4 KB Created: 2021-03-31 12:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5355bd15027c2b15f75ad25c6047c608 SHA-1: ed5ebf1217a7bae720669d86af9176d5d9daece6 SHA-256: 2e35680a66dea875f28b98ea9466a586bc06b556340b3e0635b9abb52a7798db
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'muskoka chair plans pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://fokemale.ru/award?keyword=muskoka+chair+plans+pdf PDF link annotation
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/9274443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382972/normal_5fec245cd9504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471481/normal_5ff9058dd016f.pdfIn PDF document text
    • https://cdn.sqhk.co/detateseb/7hegi1L/fun_descriptive_words_that_start_with_b.pdfIn PDF document text
    • http://logorag.22web.org/python_flask_tutorial_corey_schafer.pdfIn PDF document text
    • https://moxuludo.weebly.com/uploads/1/3/4/7/134759924/xidefaveleronat.pdfIn PDF document text
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/sokaxof.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/1igjhg5/nebuwobudobupijezeva.pdfIn PDF document text
    • https://posolefuriw.weebly.com/uploads/1/3/4/3/134374222/641727c8d54.pdfIn PDF document text
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/jusame_xidifope_denuge.pdfIn PDF document text
    • https://cdn.sqhk.co/dejenuluzew/bhhjgja/binofojezivunelorasis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://posinumufupe.epizy.com/turntable_dj_mixer_apk.pdfIn PDF document text
    • http://xavisijividefo.epizy.com/telefono_informacion_ayuntamiento_de_malaga.pdfIn PDF document text
    • https://42172c5f-463d-425f-bc49-3536d5e9b788.filesusr.com/ugd/3e9aab_95b3b1908e4a42d79c9bf985cc22a2ae.pdf?index=trueIn PDF document text
    • http://laxojidosap.epizy.com/tips_on_how_to_live_a_healthier_lifestyle.pdfIn PDF document text
    • https://969948a0-d7f7-4827-958e-a3856fee42d4.filesusr.com/ugd/9d40bc_daee5ea918df4197bf00359f39f893d3.pdf?index=trueIn PDF document text
    • http://noxoxuf.rf.gd/oxford_bookworms_library.pdfIn PDF document text
    • http://suzubozoze.rf.gd/18441754965.pdfIn PDF document text
    • http://jipinasin.epizy.com/92592329220.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_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 5312 bytes
SHA-256: a8994b94491cf177b852155c6aa1bedb4383032eeedd69b7cf9d9a2b4b98a68f
font_01_sfnt_off0000f664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 11032 bytes
SHA-256: 2fdb6a0a604e84a30203ad6a328f02094df4fe8fd386e556585ba9dcefb0c251