Malicious PDF — malware analysis report

Static analysis result for SHA-256 7068ab5ef1785b31…

MALICIOUS

PDF

103.6 KB Created: 2021-07-02 20:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ae0dad0763de04662eb208fc4ae11df SHA-1: 7aba4d0c090e0cff60ddfdde7ea66ab9d68b990c SHA-256: 7068ab5ef1785b31aeabdba43653fd7cb2d61ff006a527556bf79649632bfa72
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, suggesting it is not intended for human consumption but rather as a container for these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9766

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 http://ascensionchina.com/userfiles/file/65412255160.pdf
    • https://alarrabnews.com/images/content/content/file/fitiwekanumaxazasuvegiz.pdf
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0603/afcd48eafe2cc32d684d3cffa5372212.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890729024d0---44604283735.pdf
    • https://smartstone.ca/userfiles/files/vazixevikapezol.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/pd91neu1c2et3ku8vbvqqkk4q2/18100902636.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072efa84ad69---49514116443.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891265e404b---topalowaz.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/99f230ceb9a821a3134e126f5d7625ed/fabofibazakawudiroraja.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/fimorudunigalubapobe.pdf
    • https://ive-cal.it/file/matele.pdf
    • http://dambi.pl/userfiles/file/96693916842.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/4vcdojgabhgfs8cd1k05rbogp1/wedarokagixegofevo.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160c404f4f2f39---89665672560.pdf
    • https://luminex.pl/upload/file/furamuvudaxoki.pdf
    • http://adamlegal.com/userfiles/file/20998429137.pdf
    • http://vantaibactrungnam.vn/upload/files/nipedove.pdf
    • http://kxnjl.com/userfiles/files/nevunetakoredev.pdf
    • http://hoangle.vn/uploads/userfiles/file/padebo.pdf
    • http://www.pranabkumar.com/fckimages/file/73019641851.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/0a3de0bc550fc9ff3b0293fb510ee40a/sekizukofuxigedepib.pdf
    • http://geose.ru/userfiles/file/80644039143.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16088cdf9d8126---8266803567.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=segment+proofs+worksheet+answers
    • 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc40.bin
893a8e1362f549d7de4ee2020b32bcfe32fd75ca161f781a0f5e7b5bfd2d96c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC40 16504 bytes
font_01_sfnt_off00011352.bin
7ab67eb5a78867af395305495c0a69093de7808183127c5b5d134450deec6400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11352 10920 bytes
font_02_sfnt_off00012c48.bin
fabe582b6e72d476b20c6394caf674995a6f2d99efca2ada3d332f0885e890dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C48 1280 bytes
font_03_sfnt_off000134a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134A7 16792 bytes
font_04_sfnt_off00014cb4.bin
55d5c2d030bc690fd16642c75c93adf16f88f65af55e4b389664228268a0e88b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB4 1992 bytes
font_05_sfnt_off000155b6.bin
104a65ae08bb6bd4f093326e101e600b28d31192a45063810fb9aca5f7e043ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155B6 21340 bytes

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