Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae3397d8a2b70e2…

MALICIOUS

PDF

84.0 KB Created: 2021-09-05 02:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2dc40e42eb8af32bc45ad7db2e521cf1 SHA-1: 913c417ca9e9de19574cc3042f42c042093f71b0 SHA-256: fae3397d8a2b70e2fa476d0f142b5a5da678bba368d3e7c6388e1e980db9ec39
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating it's likely a phishing or malware distribution lure. It contains numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The PDF structure itself is minimal, with the primary function appearing to be hosting these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/ek0dumt55qebko5l6vdqas6s10/82887110288.pdf In PDF document text
    • http://ndt-tl.ru/upload/file/82017246742.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f7881f664---31374448005.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/b6gl9mjoou65hscc96cfcbm7v2/27400621477.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/71153999367.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d118b506c---33933437470.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/1038ca285a7e8074cd22bff1ae33cd54/39953424363.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/sikanibomomeladumeveji.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/senikukotuwuluxi.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/89117567441.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/29660040915.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5ad29c1fa---zesododomijogusifoburefu.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c031239ceb6---89249399640.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/4ce9e55d92330d50b970a221dfd477aa/55601142405.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2632756a6---20684950893.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/30949394308.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0eb099ca374b7e2c5453ba78cebf5a7a/rusupotus.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081f650c3d79---tadamedoluxofudivolol.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/43487055630.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/129fb687dd7a2369c302afcba2b29636/4749364628.pdfIn PDF document text
    • http://asvpp.fr/pdf/46153602359.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/70503975181.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/b5a5626cfc1cf7791cc7ac8cf03a7a40/46351849524.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821ee57cd76---62021091632.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/giworobogiridofibaxazet.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/50cfd6a6a0d1bb149a57818bebb8a003/96367939064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=jung+interpretation+of+dreams+pdfPDF link annotation
    • 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_off0000e331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE331 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB43 17768 bytes
SHA-256: ca03dbce9cc01927a0e3d23aed3a25e2d9dbdb65a332393403375fb9c4f0212d
font_02_sfnt_off00012901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12901 10884 bytes
SHA-256: 07f497fa0d50d5f2e7b34e6748e265caf9c1cd3adbe39a5c50694a0eb207aae8

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