Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e571c227dd75cc…

MALICIOUS

PDF

95.1 KB Created: 2021-03-26 01:25:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a5aec229c0df1418219a513d0635849f SHA-1: 57c4da437dcdac855391533db0fd5618321742ab SHA-256: 53e571c227dd75cc152cfc0915f71709f41dce1a8fefe1089198a17905a85e0f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 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.
  • 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://bologen.ru/strik?utm_term=tony+clink+the+layguide+pdf PDF link annotation
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/magikuwuve.pdfIn PDF document text
    • https://letobepep.weebly.com/uploads/1/3/0/7/130740206/jataduxo_dakabixibibepo_vefop.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/werukol.pdfIn PDF document text
    • http://autocredit.moscow/fazedepuziwodisahtkv.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/cLB9Khf/6390313302.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/napazazuvowazuk.pdfIn PDF document text
    • https://minizejemeroro.weebly.com/uploads/1/3/2/7/132740725/mukukura.pdfIn PDF document text
    • http://com-connexion.xyz/4348616590n6968.pdfIn PDF document text
    • https://cdn.sqhk.co/dilereku/OhiUbgg/train_them_to_cross_level_15.pdfIn PDF document text
    • https://rivisaforepip.weebly.com/uploads/1/3/5/3/135327755/9184990.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/ghyiipF/tipigudajijazufa.pdfIn PDF document text
    • https://lakiromepokina.weebly.com/uploads/1/3/4/5/134589127/6752380.pdfIn PDF document text
    • http://lessonsonline.site/27343668853gbg4x.pdfIn PDF document text
    • http://myfoxing.online/69332092129p04hz.pdfIn PDF document text
    • https://sibubusede.weebly.com/uploads/1/3/2/6/132682984/83241.pdfIn PDF document text
    • http://espaceabone.com/how_to_describe_the_wind_turbine71mb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dadupawo/java_aptitude_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/mudikudukijipe.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/dajuzazijoparemagelixi.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/16231703716.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/las_bienaventuranzas_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/fovetewavifuruvaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/short_story_with_synonyms_words.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/inclined_plane_analysis_physics_classroom_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 16912 bytes
SHA-256: edc8f6e6305915dc46ba0ca895b101ae51342406ac31411d1028e8a245fde8f6
font_01_sfnt_off00012850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12850 5140 bytes
SHA-256: edcdba4f3595b6b64609c896389185163aab604a0d24f0a44a17d1911254097e
font_02_sfnt_off000139d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D3 11748 bytes
SHA-256: 0bfbc5b899b15396734ca68323e583ad46c8b07ad4bfc89f88c691b17332791c
font_03_sfnt_off0001607c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1607C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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