Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fc0e7f7fc8a95e…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 20:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47daf4c3215985b5bcb91fa8c29c67f4 SHA-1: 90e0eba431bfcb90a9ddc5002ffcf1f778432dd6 SHA-256: 48fc0e7f7fc8a95e348bff68e09cbfbec2dd722fc3ea29640feba5e80645d160
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. This pattern is commonly used for phishing or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/e212db3e6450e89a3db8fd09ad0c59e8/xinusaf.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/e7508c9ec5b9f56aabd4ec8a587c1c43/9439286829.pdf
    • https://digireg.dk/upload/13790567917.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/0lg1pltf8u7n3qnfgt0o1agp94/tiwesivuxezava.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/f66da99bd0f07f064c79be201f0d78bf/62533813819.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160759e6b72293---86182978894.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609878f1140ca---93077034000.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093ce3adc0a1---zibidisugeg.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/knloe7iu8d1dp7m303v33tbar2/41799756908.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/98h6ee357ctemm7ru4nb3iaahj/pisinobijugubitezanibijas.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859a143a0e6---7715850817.pdf
    • http://hiddenroots.org/clients/19739/File/67448551422.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b89363109---64001963370.pdf
    • http://musikpark-live.de/userfiles/file/saxawufosixuviwawewezu.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6210e7f1d---jananivonibi.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/9d5ea15c35141db85c8a6e6797d59153/meretovid.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/e6b6587049a93c19c2f1c7088ad42be0/43308831409.pdf
    • http://luatsutiengtrung.com/app/webroot/uploads/files/kemoveratugevule.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/r94qk7hsll9kere9l2macedgc8/domexozez.pdf
    • http://elitaliaweb.it/upload/file/72369354214.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/2650b0beb7ecf2dcf2416d0dbde348ca/xosifevaralemulexiruv.pdf
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/70993411900.pdf
    • https://alternativecarrepair.com/userfiles/file/sinakalidegujomifo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=mht+cet+question+papers+with+answers+pdf+2020
    • 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_off0000ea88.bin
19f5c369b54984cb595dc55a16a5aff57adefdf4c533c357d69aae85fefabbc5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA88 11236 bytes
font_01_sfnt_off000104bc.bin
e3c6f7b55b0b14c7f2308b3f42f03f639b737b85f821ab9667cb8de5f3cb5016
pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 17876 bytes
font_02_sfnt_off000132c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132C9 16792 bytes