Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdadc48b1fd0b0a…

MALICIOUS

PDF

90.3 KB Created: 2021-07-06 15:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6de5e477aa39708ae675d7cdbae1a19 SHA-1: be3e5d28b98171fd2f70a5f89396839a811ed716 SHA-256: bcdadc48b1fd0b0a0ff35a7d5662a80b71da9f8ba7fe14491355cef0fbe08d75
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, indicating a link farm or phishing lure. ClamAV detection and ML classification strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites. The presence of multiple distinct hosts and link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://itexpertdog.com/upload/files/12642061665.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160892ee3176cd---77980990823.pdf
    • http://www.anclupnapoli.it/userfiles/file/92679667806.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87d4b09109---vadukaxabozakimurawiveg.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ce29073fd04af6937ce69158a0e385fd/vadekadipeg.pdf
    • https://usssecuritate.ro/userfiles/file/xasagosasuru.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/4231c9761ef287f6313922a5e7ede627/22838642713.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c75024f29f6---gobejozi.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a77815912---6040149514.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/s87c3bcqqc38oh2u102ls5dk0c/fifukobidamega.pdf
    • http://adamlegal.com/userfiles/file/30604886460.pdf
    • http://okmarin.ru/userfiles/file/wudululejozotadijo.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608166d02aa7b---42038949529.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3efa513fe---xigazajofusekozowelosum.pdf
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/c7a61d6cf898c3c0900765d8ce8818d3/2886526306.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae324ef0694---17316703270.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc71e42c9ec---kitosu.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ff0a47058ce5c05e54a00ad6908cfafb/ripameziliwupobiweg.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ab9a40394---33271418834.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c9d9d168---35991110695.pdf
    • http://daiichibus.vn/uploads/news_file/kekapamujozusulu.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cf926569dd4---govexur.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070edc1a1037---vixazivuwovoju.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/cpubthup8pnbmfts79f8f0frqt/80971137223.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/4033f23d30e3bf9090f322e75023546d/kolodalumuvutimot.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=list+of+vocabulary+words+for+college+students+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_off0000fec2.bin
eb72e7630d887ee93d03e3d89f1906f4dba3519a63bd64ac398739b92ee94ad0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC2 11260 bytes
font_01_sfnt_off00011902.bin
1747211d782193203139d90de5d04f8553ac690735829c1c48e512d672e84d1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11902 16412 bytes
font_02_sfnt_off00014392.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14392 16792 bytes