Malicious PDF — malware analysis report

Static analysis result for SHA-256 68849816af52d997…

MALICIOUS

PDF

76.3 KB Created: 2021-09-03 22:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cc23a04acdf908b63cb9d6f7bbe5373f SHA-1: d571b85e1a85c9aef5a2c1be33fc43818da05f84 SHA-256: 68849816af52d99773af9e45b1f9ac7903cfa26b53d70db96017a6325318bfa6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm or phishing lure. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan. The presence of embedded URLs and the nature of the heuristics suggest the PDF is intended to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://cructi.ru/uplcv?utm_term=molecular+beam+epitaxy+fundamentals+and+current+status+pdf PDF link annotation
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/kajmoqevp6li1ifsaa0pe87g3f/ginulep.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d1157c0e22---52404397718.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/856c9b7bdcc31b365016e9a031b4e749/95418462339.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160703728e510c---52415380186.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52951107a---32361119301.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/52791759582.pdfIn PDF document text
    • http://www.scsk12.org/policy/files/files/78860172666.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/bafovupo.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/o3q33l3djm0k2n83q0tesnrd4s/92634092284.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/lomibivazedif.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093d50bf1bcf---95213457266.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads//files/202108130623591744.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8a88230b---vanukatutarapisomalu.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/e8u1k24m3scg134b0vlktrftmk/69165779364.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5c78516f2b3ebb942be05efe8b6fcc1d/53903319706.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210604135807_46112452.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/pejexuxuzagagap.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/kivizazulagameva.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609883af4ca9c---31249214505.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/47645227465.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/gvjje9thdvv5tlom9vo167qd95/78635065876.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/82720633028.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b235eb0884---38485761506.pdfIn PDF document text
    • https://electroagro.es/pub/files/88602496877.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/lvorh9f15pvt3d2i92vkmb2od0/88096046097.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/56725543412.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_off0000c75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75E 16212 bytes
SHA-256: eec99fbbd3d00631d21b1de0e803ecbd700f0e917c7c2b7c894911f8ea84b801
font_01_sfnt_off0000f0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EB 11228 bytes
SHA-256: 508116511250ee017e7d53d02c03d6b61ec97468e79495569efd129798d28e0f

Open this report in the interactive analyzer, or submit your own file for analysis.