Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4683063ab4e886…

MALICIOUS

PDF

95.7 KB Created: 2021-08-21 06:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: daacf894273376b71ea92771a3c84ecc SHA-1: 4d04875f35e9125006d0c53b4cf9cfe1cd8a81e2 SHA-256: 4e4683063ab4e886d6dd1ff8fc38645374f1dfb5bfda53668da6be6ef415c49f
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=damon+ps2+pro+bios+file+download+android PDF link annotation
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/6471bc21327c5784a6f1501e8df9ab34/misodopobokej.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/nekitoripitoxes.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210626040053.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/85588513656.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/wuxotibikokidajalularo.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/wejeroroli.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fa552d539---84369796403.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/wokutofelifoditotupo.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c155ace5a16---26093949126.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607705b9b7570---32540125755.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7340385504---2122447522.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/cc59f94f3d8577d52eff8dd005aaa3fc/demiva.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/91723251713.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb73aa227---3555447244.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091543eab2be---zuritozilusazetilete.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/91153824028.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7b6dedf05---fitisapumolajigozoxel.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/vosogodujukuzezitugiru.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/xurotagezerekemigovex.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/sk2ic1bd7ueccteafnudofkcvq/wizuvabevawuxipomatexefu.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210530033254.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160efe12f45cb9---bifuzexiravotis.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/19131378742.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2e836accc---71584467971.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/nowazojifalinekejas.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 10908 bytes
SHA-256: 225481506c5270aa86a21c4da55550a415c8ac6a89616a3e8490789692ecd1bd
font_01_sfnt_off00011278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11278 18188 bytes
SHA-256: 15a39dc041f54c555e020fc6c0a6ab4688d2a7bad131af38928a04bc2e7846b6
font_02_sfnt_off000142c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C0 16224 bytes
SHA-256: 749d0e0a2ebbce6e3a842727ccefc785b5fde86fcdd6c62922dcb2c91ea58cfb
font_03_sfnt_off00015889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15889 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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