Malicious PDF — malware analysis report

Static analysis result for SHA-256 d056d25c3f376e5f…

MALICIOUS

PDF

117.8 KB Created: 2021-06-27 23:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e214d435f96c79bb96ac68ae4597af71 SHA-1: 64b703002163424de4f9b8feb2d09abf65db6a77 SHA-256: d056d25c3f376e5f1555a4b62a470b44b6f0a166e21a13d6e434f386236ad12f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document functions as a link farm, directing users to various URLs hosted on compromised WordPress sites and disposable domains. These links likely lead to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9234

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609c20168ffa4---30794767078.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/66d43ccff32a0e82c3292ac731c4f0de/4583771238.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba159a1d97---gaxizetonovunowikenag.pdf
    • http://zulaikhatextile.com/userfiles/files/43248964218.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842e043cb10---49497482921.pdf
    • http://ngor2-3.com/file_media/file_image/file/80361410074.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a923d462d71---88826459691.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07d4d8f2e4---tenow.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c941234f57---rirudilojawolab.pdf
    • http://alliance-ltd.com/userfiles/samojarukojukamepadenadij.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091ba4bb6ee7---nogis.pdf
    • http://bettaletroom.com/file_media/file_image/file/89008074543.pdf
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/zexemamelakibana.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4c4d5032b---varos.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb0d442b48---93298894943.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7985529f1---pebevasazakapegepiv.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/0a566c13fe356432d413d7b5bb25552c/57485782732.pdf
    • http://joy05.com/_UploadFile/Images/file/baditazid.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/b60a57c58bd59c0bac21da155d7cec6e/xesuvav.pdf
    • http://mdc.ir/ckfinder/userfiles/files/dufebimalupilelavomir.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dac3d4947b---58252997462.pdf
    • https://fl-forever.com/upfiles/editor/files/zojaxi.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/e0eb51f66dfb074ef5fb11c62d499ed3/zexelogumefokuvatovifidaw.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768f6eca59a---84819078376.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/1b9578ad83619c8cf0bbbc72b338ce83/65188397115.pdf
    • https://weeb.nu/userfiles/file/lugafasitisoxazefowib.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=taxi+in+afrikaans
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00010a7c.bin
e58642a1772bf7de0c44e7fc3f5472d4d715f792da7a59e2f6a9790693469c2c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10A7C 24924 bytes
font_01_sfnt_off000138b8.bin
4f41927789bcfa8fb38b320e6698f6a5822ff3bd0fd52555104b9b736b5311f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138B8 9968 bytes
font_02_sfnt_off00014ed9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED9 16792 bytes
font_03_sfnt_off000166eb.bin
6264e939854c31f4457b3780fcecad215addee72f6e554a8afb5d97c8ee0ae8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x166EB 30656 bytes
font_04_sfnt_off0001ae39.bin
5c221091eae0cbe526e6ba851eacd629783a43438d6456f1b44929041440c6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE39 7516 bytes

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