Malicious PDF — malware analysis report

Static analysis result for SHA-256 e148633b7bb43def…

MALICIOUS

PDF

80.7 KB Created: 2021-06-25 23:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: caf36a5f92259ef3e8bcdcb0b8108f0b SHA-1: a06e7668026799f3a01f3801fa0a6b5ebd9d48f8 SHA-256: e148633b7bb43def79a8c8d530659fd37e20110d5107601463e9c8c016a7e012
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to lure users to phishing sites or download further malware. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://garglob.ru/uplcv?utm_term=ed+is+a+suffix
    • http://safeabortionnepal.com/userfiles/file/54869882945.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/msq6uarisr57u37d68l5k0krsg/zatowadazinexexasij.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e7282fdab---mulibizojevagafusawuka.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160842e98274c0---74500402805.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e93028314a---13508250010.pdf
    • https://digireg.cz/upload/nojazurazenowunepoxajo.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/edc95530fe62631af2fae436cc5e25a8/pibebib.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/839aa26cf7fc834d7c27fc2319d099af/korebagirase.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a2685a119---86960731464.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c067d55dac3---jagamexos.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e272da865---zepisifumesidisasud.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/d3fd0f759dba65052f5b152d7d8a24b6/94664490460.pdf
    • http://baugeraeteverleih.de/benutzerdateien/80518194400.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a44475c8416---temogos.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/de347142a90a0d6bedf2f88ba61700ff/deroduwisisepanoge.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/4d75eff9dfb218722ff00a80c6e1abad/78604012329.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a20a4c2b68e---manemutudepagipilogemo.pdf
    • http://instant-image.net/UserFiles/Site/File/retalisodixowen.pdf
    • http://abnicum.com/files/file/72064147679.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aae26bafa---61853310683.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/ec560gfd7rmt1lng1e8uudb507/finenu.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a20d987c27---39983788547.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094be361a962---57922481635.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0595b6659---jipadonapetodorosiwi.pdf
    • https://banghenails.com/upload/file/pozivemonusububazija.pdf
    • 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_off0000d7b7.bin
d9824c8244f75d8542426867dedfa467c9126c004121f43f2f0fe66107d2c989		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 9932 bytes
font_01_sfnt_off0000edbb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 16792 bytes
font_02_sfnt_off000105cd.bin
0dac9374d6e3e4d9de38166e03a37a738a8a068936e2012fbe042a1cd86d2c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105CD 18412 bytes

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