Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ac5eb3215e032f…

MALICIOUS

PDF

82.8 KB Created: 2021-09-08 09:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 202bada7ab3011df923d03f5185861fe SHA-1: 0ad1ee57e7c52c74a9309af54b57028bebc4adb1 SHA-256: a8ac5eb3215e032fc6b355adc82f800cfb73235511d024437f089c9c59a0b613
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also features a link farm pointing to numerous compromised WordPress sites and other disposable hosting, suggesting an attempt to obscure the final destination and evade detection. The combination of these elements strongly indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=1996+toyota+tercel+owners+manual PDF link annotation
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/gm3t2lun4g2rqeohehqc3u10o5/6642066737.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/lotiwesudoliz.pdfIn PDF document text
    • https://peterdegendt.be/file/nelapinaratefam.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ef54862a262e5ae0aa13b240e68e1558/xaputuvonegezapuzinibixi.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/1d32ac807bb85c097570bef028816b0a/genolaze.pdfIn PDF document text
    • http://skupka23.ru/upload/m/99410996395.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/pifupig.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/frcp8rm5n3ns962dvtkpjki810/80233691697.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad20537dfc9---54830464276.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/deveru.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac87be8c1d5---kemafaropimilukamiketuf.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/27358231608.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/39288036175.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/fugodulobinikijajafov.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/54742037794.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/11489253265.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/aad74b10018f2275625e170ba6062b33/69229985147.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c81772528c---gomek.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890419edc2c---lotewexobujuw.pdfIn PDF document text
    • http://yingtailong.com/upload/file/2108271121199716562bl92sgg9gub.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b369dc10309---59896768773.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/32015101181.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/89947526556.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/33409504683.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/155a908a233b7396d3b1eb875d28a05a/58099812900.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD52 17884 bytes
SHA-256: e440ffe7a0c440e450ce10933e4661dc4d4d673a57acacc601c722aec52f5711
font_01_sfnt_off00010c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001247e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247E 10892 bytes
SHA-256: 39e45f4ec355174e0bdd182e0359f7c439c5983fa453b3f5bfe23794e30e73c2

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