Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed74a14d2b7fd54…

MALICIOUS

PDF

126.0 KB Created: 2021-06-28 14:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 18b5c44dcaf9fac336ce90283715f9e7 SHA-1: 9b54a7f7d060e6a32d5fa55abe0d90221b1673c3 SHA-256: 5ed74a14d2b7fd54cbece529c6d3080dfa381ee0ce1a0e21b78a8c3f078bda12
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, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various domains, many of which appear to be compromised. The ML classifier also strongly indicated maliciousness. The primary purpose seems to be redirecting users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://viettrungson.com/media//Files/31468364609.pdf
    • http://bogelaipigeon.com/upload/file/12356563138.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b81fa07f45f---95405470300.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/dq2o4l3glpluhlc0qqlo5mk2l7/nejusedukusikagixixu.pdf
    • https://behbehaniprojects.com/uploads/files/84496358593.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8aefd66982---37694152966.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/9ca3637fb254b7de51c34fbbfe53a2c9/36046827681.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/6bdf0f0002daf4ae2fb86a858d60a5b7/zufuve.pdf
    • http://yorktownhs1987.com/clients/57482/File/75842090709.pdf
    • http://sushikyototogo.com/uploads/files/botepixesufogoduzete.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47b7ce19aa---43279840052.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/7fm3cghpptm3d4b3km6k0eaj8u/19026742098.pdf
    • http://tamker.hu/userfiles/file/sukalaxerivazibi.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/4tjndajcuorap0s4eto6gie8f4/gerituresadifemoxa.pdf
    • http://vbs.pl/dat//file/kowugejixuxubuled.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a7483b2049c01e4f92d6e4a2df125da9/66080688473.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/sgrpb7bmrdi41gs85ib004eamc/23602443872.pdf
    • https://deltagroup.bg/uploads/file/tutukopo.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b2d568d7f83---tupatufowalejavufer.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607498a529880---watomubejijurafelutolexi.pdf
    • http://mikailang.net/userfiles/file/20210505064910_363218792.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/1i060jkqodh11kfabdp9d00rjt/lawipezezed.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=john+newlands+law+of+octaves
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000189cd.bin
ba5393e49441048309afde3992f5bb64df1226e74ed9b46c8ea4cbea05b60721
pdf-font-stream PDF embedded font (sfnt) at offset 0x189CD 10524 bytes
font_01_sfnt_off0001a1dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1DC 16792 bytes
font_02_sfnt_off0001b9ee.bin
590a35c47d8c008d09861abe6bbcfb2e0564e5e6da567763e4effe6415b37aaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9EE 18184 bytes