Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd04cdd16f537e4f…

MALICIOUS

PDF

138.0 KB Created: 2021-07-04 06:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76481dd3739923b8e56bcad493eb328e SHA-1: f6dd8013d3e8441bc3e1e0cf96095148ac0daa34 SHA-256: cd04cdd16f537e4f32843a366986a591112b7dedae110a8b31dca2e979023038
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, but the presence of numerous URLs associated with compromised sites strongly implies a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160939ebd28592---75193417245.pdf
    • http://baohanhranghm.com/upload/img/files/25723646028.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/159nrmn93ot3j2dkq15jro4c9m/55677384240.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/o4edo019542ic0ukct0pc52g2l/xijituze.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfefc76c891---wapewipa.pdf
    • https://decoveinvestment.com/userfiles/file/mururebamud.pdf
    • http://gmkms.net/upfile_editor/2021/files/7546562736.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u5rs1ev7rrtrt06cheq9rb8uq3/wobeduxironarosugavu.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/9524bd3fd5b5726b6b540fdd62442fc6/numixuxipowugamewuwa.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d25284982ca---tiluxibozizosezopubasiter.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e83d67d3e1---52237239639.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/f0e7326b891cf70442cf28a2e936cf00/61529500553.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/ac72a6e7d9a5558af574298dc2996477/92349904840.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070aa2b29c49.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/fd4abeaf6144d74fd363b3fc128bbe22/gexosozunala.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16072a2d227b18---93730237290.pdf
    • https://agrilaui.com/userfiles/file/sogujiwonuv.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160893a2eaa94b---nazawuzaledud.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/sdpc5sg64k1lav5dpl2ij7ssac/fuvoza.pdf
    • http://amoy-art.com/Upload/file/fapivudalerodusi.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c9dbe7cdf0d---58423434564.pdf
    • http://www.egavilanes.com/ckfinder/userfiles/files/82759023056.pdf
    • https://la-klamm.org/Files/files/82627545954.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/8qon6mqn4everasuht298r07v5/29414322316.pdf
    • https://socohoteldanang.com/uploads/image/files/7142174182.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+handsomest+drowned+man+in+the+world+story
    • 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_off0001b94b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B94B 16792 bytes
font_01_sfnt_off0001d15d.bin
69dde6d6c8235d2c7fd1dc70c1aaf5acbdc65ec34b7be3f0a7ba93a62cdcd286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D15D 17928 bytes
font_02_sfnt_off0001ffdb.bin
0ef8de5dc590d4c9d3c23ffd4e13f51a5dad5200f2f03e1b30d7762081e02d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FFDB 10676 bytes

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