Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c405a422a4bd4a…

MALICIOUS

PDF

79.5 KB Created: 2021-03-07 23:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00282798266d5edd96f2aff2fcbba16e SHA-1: 77ce1049d5bac71e88522e80aae83892feee1349 SHA-256: 57c405a422a4bd4a9bc85e8d721901b1544bace2a8e4c206658c53bbf6aa5371
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a large number of external links, suggesting it functions as a link farm to direct users to potentially harmful websites, such as the one associated with 'fallout apk mod'. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=fallout+apk+mod
    • https://cdn.sqhk.co/remowiwa/hdUjgzO/wingstop_deals_thursday.pdf
    • https://cdn-cms.f-static.net/uploads/4416299/normal_603b96f323fe3.pdf
    • http://copyright-services-us.com/what_is_the_geometry_of_a_carbonyl_group0vfab.pdf
    • http://kfcrabota.ru/socratic_questioning_methodguyb9.pdf
    • https://cdn-cms.f-static.net/uploads/4373522/normal_60433bd04970b.pdf
    • http://cashfree.store/smashy_road_wanted_2_zombie_apocalypseok5ps.pdf
    • https://cdn.sqhk.co/xajimujigaju/cMlidhb/funny_soccer_physics_3d_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_a2f56911eef94e3aa369872ebbb2692b.pdf?index=true
    • https://s3.amazonaws.com/tafogusegabomu/public_speaking_anxiety_natural_medication.pdf
    • https://s3.amazonaws.com/tozaduliwubega/comment_actualiser_formules_excel.pdf
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_08b81d5316d340b6a26667fb2f3e3ecc.pdf?index=true
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_c5fa5400d5924885b17b8881711a51d6.pdf?index=true
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_b71442069be84636a7394f9163db7340.pdf?index=true
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_16666e77e53b45e1959ea903cadec12a.pdf?index=true
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_c62c06f290e549eea0822d752d5e280c.pdf?index=true
    • https://s3.amazonaws.com/ganubatebedoxez/51268695979.pdf
    • 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://scripts.sil.org/OFL
    • 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_off0000e707.bin
bcf76bf8cb0cedb1591413c9cbb0489c4dabacc6742d189ade3483fab574bcf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 4852 bytes
font_01_sfnt_off0000f77e.bin
020cf8568b999ad6e5354ec94b4ffc2f063c211b3354fe61e6b09410ed2c2700		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF77E 10644 bytes
font_02_sfnt_off00011c29.bin
f283a563ee48c68d0f210b91d059b93f2da97875a4894e08c15e1f8ed5b97a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C29 16076 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.