Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9adea1b05a31d8…

MALICIOUS

PDF

72.0 KB Created: 2021-09-15 21:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a922573e2a2b5d42ce96aa2d4cbc35d6 SHA-1: 2c2035dbbcc6b298f8d50258124a4e123fd40794 SHA-256: bf9adea1b05a31d8acb6882fbfdef53126efe11b3020d5fcc2499e7a8db1ee15
164 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The presence of a 'download button' heuristic suggests a lure to download a payload. The embedded URLs, such as https://pixomot.ru/uplcv?utm_term=mp4+juices+apk, likely serve as the distribution point for this payload, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=mp4+juices+apk PDF link annotation
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/f9igichknj9scqpdtdkf3qarcf/15035442732.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ede12a3ad9---81488460201.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/waponatopuleru.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/tulanuposukusikotu.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/33210506652.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/vususu.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76401250024.pdfIn PDF document text
    • http://sdhmladavozice.cz/userfiles/file/3003698703.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/fufulegezapizitazetegipi.pdfIn PDF document text
    • https://shinaltd.ru/images/file/29105886967.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5dbc31f08---9237899426.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/35201220298.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/49354778381.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/86586064425.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/84712284844.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/11671411587.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/wirajufoj.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/69788047932.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/61037301038.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/67512384162.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/74607968868.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/59184274398.pdfIn PDF document text
    • https://flims.atelierleuthold.ch/userfiles/files/noxufezikujopunovosab.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/gogaluwavofumejikelozifa.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/walasixipa.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_off0000b877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB877 10292 bytes
SHA-256: cceb883d10b45bb797e86d01c0d556b77a960bcdcf450801df5c2a83dfb56808
font_01_sfnt_off0000cfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E9 16524 bytes
SHA-256: 7c0cbd744a26ce5052c6310dfb8f388dd8c3b92215a30039be5ef175fe44e917

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