Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a2a7cf85a01d1d…

MALICIOUS

PDF

62.4 KB Created: 2021-05-09 11:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8f39636bb58917ec789b02441b8b9ae SHA-1: 7ba4fc76cbbcc328deb2b086cb37b00208ddb487 SHA-256: 50a2a7cf85a01d1d9881d97a71d7eac19a2537f034284df770403ad9ad3e1be6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document is classified as malicious, likely a phishing lure, due to its use of link farms hosted on compromised websites. The document body mentions 'Skyrim steam_api.dll crack', suggesting a social engineering pretext to trick users into downloading further malware. The presence of multiple URLs pointing to compromised CMS uploads indicates a pattern of distributing malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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
  • 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://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a0c04f1be---86908908335.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/fa50eba1968385e2169ddcd9a8917375/befowanamo.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160972b4b5ce31---53911900108.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfad8ddf57---76014930426.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715521efbc7---19985512651.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0019ed56658d2f26b5bd979bc2db2037/19088630717.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2612a463b---pinenajubisigabu.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0eb099ca374b7e2c5453ba78cebf5a7a/rusupotus.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/54dff4458e28d3ef9f96331d9e0af131/28261574710.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160856ad0c5d17---19847515612.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076926b0a166---59421839132.pdf
    • https://netshopnepal.com/userfiles/file/zogidejuwunara.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9ecfcabda---xinaluxegebenefitatol.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/g63kb7ch7p439smqt6c4ij3un3/68270396683.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e919634fe6---tasotamamida.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072f04dea501---donudojifalimuselo.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/1557802ad3f59b5bc2bba08531ec9fe6/24172260760.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=skyrim+steam_api.+dll+crack
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d560.bin
63ed35dd8f605f6e2b5c7cb4291ab89f91eda5f2b19f6f9ed064b73ea64bf04a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD560 5552 bytes

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