Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62700fc66042506…

MALICIOUS

PDF

83.6 KB Created: 2021-07-13 00:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c96bfcba249158ea45e57899bfae7842 SHA-1: 006a18b387e32ee7c01c9c10c704968cbe8c88fd SHA-256: c62700fc66042506001ce0c718153b35e78caef0ae6ac95f794e54841da32a96
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://asianmosaicnyc.com/userfiles/file/ganujunopetixovum.pdf In PDF document text
    • https://ceral.pl/ceral/pliki/file/vakowon.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/30289222529.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9a40aedf8---bopoxamolulirubufez.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/78964374837.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/mutapefefurodip.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/guneguzoninuxemofopuxaka.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/26079468979.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/52139389344.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210526160537332445dg2ws3.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/d9b7jtrduk4jafn3nk4i054djm/fupanapariribusafizopozav.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/67bca8e6d51168208a6b45c3f951b4ed/95561160768.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a258064a1c1---75822478160.pdfIn PDF document text
    • http://myphamasia.net/upload/files/ninanuwuwexafebojo.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/c42dd5854d6988b617263348aa773926/29171742421.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/4576995682.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa992e83d5---61365107604.pdfIn PDF document text
    • https://service-panev.com/userfiles/lotokezamuzubifizoman.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/14392876592.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075159b4475b---xaleluresepoponani.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/23893525983.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11692bc555---zajokepof.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/44156252172.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46c875e959---60958619123.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105061536355967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=fm19+touch+editorPDF link annotation
    • 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_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 18792 bytes
SHA-256: 385f28223965ea4dc9bcded9cc003e03419938c054d9cdfc27e957840d27a688
font_01_sfnt_off00011132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11132 10452 bytes
SHA-256: f5a9a813b822c5f2325fdc285524b481327a900e594b8230244bd6e564c6aa3a
font_02_sfnt_off000128f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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