Malicious PDF — malware analysis report

Static analysis result for SHA-256 09704e325de65a15…

MALICIOUS

PDF

91.5 KB Created: 2021-06-26 23:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c733bd1d3375089c153fbe4926ff7ab8 SHA-1: 5ed22c7ea5f969361f2cc3db476bd82ead5293a1 SHA-256: 09704e325de65a156ae23b1f68c87bdd2a453d72cc5417d8798f14539d9b62e2
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing sites. The presence of multiple compromised CMS upload links suggests a pattern of hosting malicious content on vulnerable websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/34bd3f5ded71235fc0e5e9aff1fa5948/jufuzenipedu.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079dd90564df---21804360977.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb2794f1c6---negarizem.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080b95901be9---vivesukupawojalewexik.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/pjhdp7gioqgq0ai5utg75m7lf1/wegebofon.pdf
    • http://allasclub.com/campannas/file/tixegimiwozub.pdf
    • http://coopmong.com/ckupload/files/xivitebofexafewurerokef.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609697aa40a04---pororituduni.pdf
    • http://digemnd.com/UserFiles/file/23996317685.pdf
    • https://muguet.fr/sites/default/files/file/98105697806.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/fia8v3ru58i06tkr837iumevpt/43891887791.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/af4e7571b0f79361d59f6d377071fc14/xuxefe.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb31e85fcfd---xejopewafefovagularep.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbbf224eff---47558492081.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b4ecd888c---22142260585.pdf
    • https://immo-cjeanpaul.lu/userfiles/files/beponugudakudawozo.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/v85fuip55205p77b5qddt1pkst/naxetanuvuwadifapawage.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c362d1da9---raniwexufimomut.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075500382657---radin.pdf
    • http://hoshitorionline.com/uploads/files/xeguzurumugasopite.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776736b52f6---61535361638.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/0qkqc5gvi4lmgab7nf67b7sod5/15561013364.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/tl1v14bkv39hd627ofunqoq1og/xeruvezuwesugixodam.pdf
    • https://mangonebike.com/uploads/file/22553534715.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=flippingbook+pdf+publisher+corporate
    • 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_off0000f630.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF630 16792 bytes
font_01_sfnt_off00010e47.bin
14ae4f9c4c11992dd6e795c7a4b6278286c079955989ba7cdd00114e5590fc6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E47 11208 bytes
font_02_sfnt_off000127fa.bin
c72f79bf62ab0bfcc5cad7e71ac6e04726d2413e28e9a8b2ac2cc7d98ed51b77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127FA 21444 bytes

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