Malicious PDF — malware analysis report

Static analysis result for SHA-256 82deb0d4c944928c…

MALICIOUS

PDF

77.0 KB Created: 2021-03-07 22:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 29fe06998cccf59ca13e7375fa25c43b SHA-1: 1ddbc8439fdfdc2ad2c8aab840fc23d3f100868b SHA-256: 82deb0d4c944928ccb5176d28c31f14d51a42d2430592a6764430dc97e9df7ce
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, flagging it as a phishing trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://zajinet.ru/aws?utm_term=past+of+listen+verb PDF link annotation
    • https://repitosa.weebly.com/uploads/1/3/2/6/132681506/891170.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/kindle_model_d00901_reset_button.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/bhagavad_gita_quotes_on_death_in_tamil.pdfIn PDF document text
    • https://zemomopefiku.weebly.com/uploads/1/3/4/6/134614162/jafuzudo.pdfIn PDF document text
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/bijawazifofu.pdfIn PDF document text
    • http://xokebidukefu.getenjoyment.net/zijuguxuwotowubalow.pdfIn PDF document text
    • https://semulojera.weebly.com/uploads/1/3/2/6/132695334/7664803.pdfIn PDF document text
    • https://zomudefe.weebly.com/uploads/1/3/0/7/130740133/6555489.pdfIn PDF document text
    • http://vidclips.design/grim_soul_dark_fantasy_survival_apk_rexdlks4q6.pdfIn PDF document text
    • http://5coupons.info/rawixozoluzosnjhd8.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/c590c3a9e66853.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/was_the_movie_shining_through_based_on_a_true_story.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/gojip.pdfIn PDF document text
    • https://dusonibegoxat.weebly.com/uploads/1/3/1/3/131380688/foviluselomexiz.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/what_sith_are_canon.pdfIn PDF document text
    • https://lazesomixasima.weebly.com/uploads/1/3/4/5/134588612/buriwizoteze.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/1821026821.pdfIn PDF document text
    • http://santand-es.com/98563922385jlnvp.pdfIn PDF document text
    • http://grinallex.shop/dexebanilelotuwutifiz2jhvo.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/tadalakule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zilowovuv.atwebpages.com/los_juegos_del_hambre_en_llamas_ver_pelicula_completa_gratis.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/what_was_the_renaissance_in_western_europe_noted_for.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6C 3080 bytes
SHA-256: ab4dd7c6bd68149b0114ba6eaa5a37c63f8b8757b7e23d40775f42a159375635
font_01_sfnt_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 4960 bytes
SHA-256: 0c1ac11f7126ff51207f74a35c6823fe643f0cef1691cee4cfbccb0cb26a2046
font_02_sfnt_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 11348 bytes
SHA-256: 72529f09595ef5a1f3a132524ea2576241e759318b6c71bc7854bcaf80de1096
font_03_sfnt_off00010ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 16684 bytes
SHA-256: 4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0