Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6232c57d1d2bff8…

MALICIOUS

PDF

81.6 KB Created: 2021-09-16 00:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: b26144d03f05159535fa4db2448c2b9b SHA-1: 8e4b30d26e52959463bb9d55674ffe3bb662b3d4 SHA-256: d6232c57d1d2bff87f5dac044b42b7d1e154888b36d0c2eb9deaca974a7360f4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9917

Heuristics 5

  • 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 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://irlanc.ru/uplcv?utm_term=tamilyogi+new+movies+2016+online PDF link annotation
    • http://wowbond.com/upload/Fckeditor/file/bebixo.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/kemowanilaronavuzam.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/pozorasuvazudewugotoxevad.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/rujamufivut.pdfIn PDF document text
    • https://nieruchomosciprzetargi.pl/files/file/pogafubawodisurifem.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12638342376.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec035949ac---xisekobi.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/mixobujiguxekoxito.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/sepoduzovememewap.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/93977661206.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/54666482515.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/50240595945.pdfIn PDF document text
    • http://ktcz.eu/files/files/47681707845.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/tisoxuzujajuzelikaxit.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/suvizeruv.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/kiratefonexerine.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614263db61bde---67264971840.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/migewakaxugam.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/33420272716.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/gulis.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/libopalilupezopuzugikef.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/levowoxeduregebi.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/tusebejafukuxuvuli.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/pitinevalasubupidubeve.pdfIn PDF document text
    • http://dworbieland.pl/userfiles/file/doposokuguzipodariwof.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/tapemovaj.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 10944 bytes
SHA-256: cc895a0dd414e154583488d1652a66b29a21c8a9127b022a1282e39a598641f0
font_02_sfnt_off00010cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB8 17188 bytes
SHA-256: 9fa6b98820e89fb31f2a340bab921daa963501dca89c8b3064bd7be1f83837fd

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