Malicious PDF — malware analysis report

Static analysis result for SHA-256 0120f4db6bcfd6ab…

MALICIOUS

PDF

86.7 KB Created: 2021-06-29 03:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 20f8b18376ea67dfe65e653eea000fd5 SHA-1: f9a079ad54316ca651c2de14db1632d769b3e89d SHA-256: 0120f4db6bcfd6ab079c277858097e65882f66b9f6a12e49738cd982453dae58
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload storage, indicating an attempt to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body is unreadable, but the presence of numerous links to potentially malicious files suggests a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/3ponbblkn1ihrjp37jdfr14j0u/lekiji.pdf In PDF document text
    • http://lawngo.net/fckfiles/vovunevigovosenagawu.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160716b521a63b---bugevuribuwofi.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/5282905146.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bf4794769---37932418300.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54e04861d---duxurokirobon.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/b965vhkhqar4qqrgsu0pp0vri2/801843719.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/jusojuxopuginawi.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7fb90e87a---6851622331.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/79606036023.pdfIn PDF document text
    • http://transinfosoft.com/userfiles/file/rigarewuganifume.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/907fa4890ee6376dbcd8b69ab9c0024c/48085481259.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/94b2108b6040b473e90b2fb5925ee0c6/tafupora.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210607020902.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6cb64f631f21c9ea5462a88258a03584/tonasujo.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/fa3801b7b19d1eb680f9b904a5ab0203/latimesopexajuvakij.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6aa1443d0---wonejenitexavefipele.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/cadd0060a932f02f12e38d729206269e/21131457299.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080a74d8741d---gadovavabosan.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/e899f68a3bd88c09828a5807f72a2359/31565792624.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/94298572220.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88bde3f511---nevaveburixi.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/62544977362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=philadelphia+concealed+carry+permit+officePDF 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_off0000ed99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B0 10832 bytes
SHA-256: 431cd73d7fb2aefe42912144087f95836d4c59a63153eaa3986a61cf07d5ef04
font_02_sfnt_off00011e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E68 17192 bytes
SHA-256: d0440130c42b10ac8eca3550b7be7e6cafc2c400e4251ff234d9ef5b1a495a74