Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfd9186b3419ae3…

MALICIOUS

PDF

111.4 KB Created: 2021-06-28 22:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f85a12be5c486aa77a712c5a15b21299 SHA-1: b23d9c00bc4ae94a4ab3bd2d505aa194ff133d8d SHA-256: 1bfd9186b3419ae3ee86826d6be6770826b1653e6860cfdad2c5230ffd070ef4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, directing users to various websites hosted on compromised CMS platforms and disposable domains. The ML classifier also returned a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://activesolutionelectric.com/images/file/nakuvuv.pdf In PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/a29e3140914469e39ef6288d7f2bd548/zuxinedasi.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/e68a005eb353b71c32e92a55718a1fe7/14847804709.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/d0d9a5f66a511033b35986d31c564c53/67331297356.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606efbb7026b2---zabis.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a819891d67d---84069289349.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f2408c6714e366ae62be2d727198c44a/ratodomigasumume.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/26211109735.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/ae1da85eed5917a1b13b57f4831db78a/4869615140.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/poxinalewax.pdfIn PDF document text
    • http://goref.ru/files/file/pujuxonu.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/41383864507.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/luwukurabedaduburu.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a176eb5f324---8822015617.pdfIn PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/gokafowojot.pdfIn PDF document text
    • http://zuche0551.com/upload/file/nalurazomewarukamurafekaz.pdfIn PDF document text
    • http://fructusartis.com/i/File/bopapilinewoxivudo.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/zigedazol.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/p9q19766tual5s6pb9bq19d7t0/nukarebigegini.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/6248301179.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/wunogefiladazix.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/a4a0ef3b40d0178de7fe01dd832f019b/66809635306.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160875bcab3ff7---jubebegezijoraf.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/290a7e747f155472b9fd0806fcea7b0b/lolorofepuvosafifuwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=title+49+code+of+federal+regulationsPDF 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_off00015380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15380 16504 bytes
SHA-256: 182c0a3f79d1fa719882ddfcc41e1f0424eb331f9febd3586f14f36fd518a89a
font_01_sfnt_off00017e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E58 10960 bytes
SHA-256: d56bb8ecb9b55e5abca1728d1b4f577d3cdbdfb888e7aecba36db3cbb39e2526
font_02_sfnt_off000197c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1