Malicious PDF — malware analysis report

Static analysis result for SHA-256 302b40d07ee7cae0…

MALICIOUS

PDF

98.9 KB Created: 2021-07-26 05:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 787aaff72f14447c7e59d92fc0e481fb SHA-1: 8aeafee8909e247e05ae147d74a337af595dfdb2 SHA-256: 302b40d07ee7cae05f54cec9fb52dfad149c18f330e301c292d05272d5690676
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond what the heuristics suggest.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://htddienstverlening.nl/userfiles/file/pewibo.pdf
    • http://rungrawin-itt.com/userfiles/files/61320989091.pdf
    • http://casadiriposomarsala.it/userfiles/files/kuwilaxedigorobudigixu.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/qjrgpn7ngckt4gmc5kuu3p2u8j/goles.pdf
    • http://adveotec.com/img/file/56651965771.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/3b8d1384f9c7a62f6551b93b62237525/53582701094.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fed9f0c251---jefavubezukivezuwijul.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/ee45e8e85b2c73a4dc3836a7b5e6ad4a/82217211020.pdf
    • https://atlastoursntravels.com/userfiles/file/julubupuxem.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd6051c170---wazonemojolaz.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/3f5dc0e34ccc3a3478eccf68f96ea5de/figotuwiwanagivopulajenu.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d5c1e2894---90697500828.pdf
    • http://hebammenglueck.de/ckfinder/userfiles/files/tigomisarisanopekuxidadar.pdf
    • http://smflow.in/admin/uploads/file/55802885809.pdf
    • http://abwcolley.com/uploads/files/ledazujerob.pdf
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/81478576341.pdf
    • http://adabaskimerkezi.com/upload/file/26094276499.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3ba5d33ffca405c40d8fe243c62a08c1/ganojatizo.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a79e417b3---rizojozavixumafipekedoxu.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608019920b3ff---luwadazirafinoxilezirowew.pdf
    • http://paliukenas.lt/i/File/fosivasikesubasonaxaroj.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/6f5d0e5615451f7471a4b508b268bb9a/98758595640.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ec3667a3b---wizaramunorobapufuw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=happy+new+year+2021+images+with+quotes+in+hindi+download
    • 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_off00011940.bin
7c6d23207d0c0b271f265907dec37548d714138ff534bbd2bc6f5650cb1bf83a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11940 18120 bytes
font_01_sfnt_off0001490e.bin
99c7708fbe1f1e8c0f273e320c62f5c81e7f4b19aecfd4274817b9286bd03ef3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1490E 11572 bytes
font_02_sfnt_off000163f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x163F1 16792 bytes