Malicious PDF — malware analysis report

Static analysis result for SHA-256 6258b24b1ca828da…

MALICIOUS

PDF

94.3 KB Created: 2021-09-04 02:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ee09eedabc2e958bff8075c8561bfefb SHA-1: ba5ee2ad41819b6ed20fe628ad915453d2e819c2 SHA-256: 6258b24b1ca828da3f6c5d45d5691e92a012f8d136c503cc4f941f034c6027e6
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's primary purpose is to trick users into revealing sensitive recovery information. The presence of numerous URLs, many pointing to potentially compromised CMS uploads or disposable hosting, suggests a phishing or credential harvesting campaign. While no scripts were explicitly extracted, the PDF format and the nature of the lure align with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://bwlpsalisbury.com/uploads/files/zikugobosunupur.pdf In PDF document text
    • http://pulsarvn.com/media/ftp/file/sadaxametube.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/kofitumofananijekeni.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/feworosawasurap.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa23c6090---mufadisizevamibukemomerux.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/lojofolita.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/15cc4ae49a93e9e0e426791433d580cf/24985733999.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/bunenabof.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/42358055900.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/dobagorijusesegaxola.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/xabukutumedosixebed.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/4459475717.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210701052751.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/229287417.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202108/file/210830071540816871ewv6h7g9azp2.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1627980642.pdfIn PDF document text
    • http://iltorg.ru/upload/file/19063909652.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/cb5cfdda47a1fad6f088062f9dbab649/21402287135.pdfIn PDF document text
    • https://sambelteri.com/contents//files/vovuboxigi.pdfIn PDF document text
    • http://atrsara.ir/resource/files/40248508677.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/55819243728.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/tobeketasuji.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/70802357787.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16123bdd12bd03---moweso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=types+of+cyber+attacks+and+how+to+prevent+them+pdfPDF 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_off000109ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BF 18200 bytes
SHA-256: 6f16a04894559599584fe9bd52c38f6ac2ac5377a11a038c7f0fe745c5072cf0
font_02_sfnt_off000150ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150FF 11208 bytes
SHA-256: f4fc31b7989c534f0c8b010ca64ae0762988ed98302ce64da77a061951cdbb63

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