Malicious PDF — malware analysis report

Static analysis result for SHA-256 69602d35c2c443bf…

MALICIOUS

PDF

90.0 KB Created: 2021-07-29 20:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cfeec6a964997ed8e74e9f780710fca3 SHA-1: f531a6956f6cda7a273631889f4d48040a983be2 SHA-256: 69602d35c2c443bf39892a16f018322b7aa5ea002bdc22576f501ff1618b566f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. No scripts were extracted, and the document body was unreadable, limiting the analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://biosystech.com/pdsFck/file/29671318375.pdf In PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/xekipodabenalimerixiba.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/potasaxiwatamefos.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/vunixirorupek.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/49415855088.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/9456318006.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/43121318927ddd9cd26e1da5d11a68e8/23049851655.pdfIn PDF document text
    • http://skupka54.ru/upload/m/33344885512.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0afc08329---samuzavefarufaxojo.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/6b970ab85edcf8d382a732b332bc74f3/19934845711.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210519/210519234239451387570gzkol4l38.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f07c9736a---41425902465.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983fb14f23d---42786275638.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/1014817835.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2a35b9324---60420882378.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c354c862a---28318388585.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/dosav4gc277agoi68mutho3b8p/57301142146.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/10844224764.pdfIn PDF document text
    • https://beaszemin.com/files/85866106950.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/dobazoloxot.pdfIn PDF document text
    • http://ahchala.com/img/file/97666136505.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/73370402072.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/17543427948.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=can+you+get+stuff+with+monster+tabsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 3172 bytes
SHA-256: 268ca8d6c2574e2216a5b132f491c388c434a75366efc9019053791a250c3f45
font_02_sfnt_off00010f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F45 11084 bytes
SHA-256: b70d60d6c35cba76be0f8d5aa45759edf058be324f1f48f92cdffb536f6bd3c9
font_03_sfnt_off0001290e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290E 18648 bytes
SHA-256: b92d807586ac763070c0c709a179d64b365fe62d6f718626735aa687b45f888e

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