Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecad0d6282080b38…

MALICIOUS

PDF

89.9 KB Created: 2021-08-18 22:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b7ba9e1d787cb2a977812b767d61cfbf SHA-1: ec009097d93fefdb15469d9cbc0539abac12f62c SHA-256: ecad0d6282080b384f3a50913dc898fab60c601c239275f6c45fb479dfe86da5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The heuristic 'SE_FAKE_CAPTCHA' suggests the document presents a fake verification prompt to deceive users. Numerous URLs extracted from the document, many hosted on compromised CMS uploads or disposable domains, likely serve as lures or download locations for secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://archism.ru/uplcv?utm_term=free+robux+generator+no+anti+bot+verification PDF link annotation
    • https://binarbaid.com/public_html/userfiles/file/peliwitasipe.pdfIn PDF document text
    • http://matras-devison.com/upload/file/3831405647.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/51883904101.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/33024073708.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/d6ca71faeea7dc0f4a30c3d7621037ed/binawivuxegakuxunufasaz.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8761c1cb3c---dodub.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/bee611288fb38ab4c6358cd018ff1bd3/wixerofuposub.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/56327390409.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/liniwekesaj.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609459c45407f---33819956542.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/40aea24e7c7bfe2399cafe270c9f839f/gegeribe.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/zobamixebugotefeg.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/32eda2cdba59a4608ca2bdb0c723fcdf/wujetivuwuzetize.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/dakerodesirogijosagoluva.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/047c073b6d4738382f1f004d36363f8b/sexamejozurosakixuzov.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/247286232996d5695cd69b8dd22a8d51/riwokodogekiguxoxir.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/vvq2boa9vrmg9oqehaetfi17c4/7875160070.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/guraxejafakabo.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/7365017797.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/minuluditosor.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/34234985492.pdfIn PDF document text
    • https://datajournonepal.org/files/12140149569.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/t1422ceir2n442553ou87joqsg/kopis.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/36995264409.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/95904804265.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/d89763ea4e6bab8af69f9047862292b7/4705547118.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_off0000fc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6A 17056 bytes
SHA-256: ae331cf0f885c37de2491728520050e3327412bc7f696fe7684146500913b975
font_01_sfnt_off00012883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001409a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1409A 10680 bytes
SHA-256: be67645bc089e0e6028e360fc3b662f555c51e41428d67ed02e19cb24700013d

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