Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf4e0baf0210c5e…

MALICIOUS

PDF

82.4 KB Created: 2021-03-17 07:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7e9945622cc2da6df1b9472e6c140de0 SHA-1: 9a9a353ae6d7c1e6e6ac8c89b30741697b40d64b SHA-256: fdf4e0baf0210c5e5026d6f7b46deb3a0b0df4d9a0084227877cb4e9667817c4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains text related to 'Global trade winds definition' and references wkhtmltopdf, suggesting it's a lure. The presence of numerous external URIs, many pointing to disposable hosting, indicates an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://bologen.ru/wix?keyword=global+trade+winds+definition PDF link annotation
    • http://vowujebotoza.mywebcommunity.org/jefiguri.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/english_vocabulary_with_definition.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/80940536807.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/bidovekewava.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/pocket_pimped_emergency_medicine_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rojotuwo/8Xk5eij/glory_to_hong_kong_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/id1xPaT/giwukibuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeroguru/8427354055.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/93611293996.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/sbi_treasury_challan_form.pdfIn PDF document text
    • http://ruzakema.onlinewebshop.net/567739742.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/what_is_the_scarlet_pimpernel_musical_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27003800-3bbf-4de0-a3e9-1eb0750c8742/33759969828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a60b01-60ed-4d7e-aaf4-a2d811acc248/what_age_is_matilda_suitable_for.pdfIn PDF document text
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_c0d573df402b4d2197af9476ade0539e.pdf?index=trueIn PDF document text
    • https://8e8ef6ac-913c-489f-8395-c30730e7ba0a.filesusr.com/ugd/f39c52_127898b831dc423f9ce7ae33c56ceb2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/wabuwisuguwerik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8004def3-3780-436a-9954-74d49d8ebc3b/6.0_powerstroke_transmission_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/2011_chevy_cruze_manual_transmission_fluid_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a170931b-f24a-4699-aa7c-5a512239055b/nuwijoxeduvoxoxo.pdfIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_ad7242576f6c47b493c0016242397603.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0000ee85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE85 5164 bytes
SHA-256: 604def86bff63a96e9396b3352a1192348ccc55c678627df260164e987337295
font_01_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 10688 bytes
SHA-256: 19b97217a7d63df2fed9f4dbe3c84b6adddf2586ce559aa321e30497f1ba70eb
font_02_sfnt_off000124c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C6 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf