Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f52c17e0ed1f18…

MALICIOUS

PDF

99.5 KB Created: 2021-03-16 07:08:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: c57465bd19a365d860144a475883b42d SHA-1: ca763abf0668c9e19d45dc8cc4f6306a9eeac178 SHA-256: 08f52c17e0ed1f18d8bf41a261bb4f07d99286704a800ae94a9c7784b682bf86
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, including one to 'resalured.ru', suggesting an attempt to redirect users to potentially harmful content. The document body is heavily obfuscated and appears to be a lure, likely intended to trick users into clicking through to the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • 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://resalured.ru/strik?utm_term=saraswati+puja+puspanjali+mantra+in+bengali PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd83a17f-64c7-4c91-96ec-d5089e24e4a9/best_way_to_lose_weight_strength_training_or_cardio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f396d79c-a455-4938-952e-50e076bf7d74/rak_bank_letter_of_credit_charges.pdfIn PDF document text
    • http://pobediwawe.epizy.com/viloze.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/75434928024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6e7fb7-3de6-4c58-803c-2f6e214efd88/why_is_skype_microphone_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/44634216071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f023417-d7ed-4576-bdab-b17d02c403e8/is_there_going_to_be_a_maze_runner_2.pdfIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_8fd111335e314044bbd0aef58dbae42e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07161b38-ceb6-43eb-a70c-043a624b7764/fumut.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_8b4e95e27209491c9252101dfbcc14ee.pdf?index=trueIn PDF document text
    • https://99f4a897-b223-4833-863a-50ad465ba5d5.filesusr.com/ugd/8e2371_ef89349c4dc64329b3f87408b46c85a8.pdf?index=trueIn PDF document text
    • http://rapaxiwoxopob.rf.gd/ielts_sample_test.pdfIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_21b2078a64534d909073ee1e1c467fe2.pdf?index=trueIn PDF document text
    • http://remigesej.epizy.com/chemical_analysis_report_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f28368-b243-45aa-87b1-bd006afb402c/rolonajekaviluba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099a4ac1-2620-4097-a966-79008d7973b7/vefufubumuwavujunafeniwa.pdfIn PDF document text
    • http://marilineme.epizy.com/angels_of_death_video_game.pdfIn PDF document text
    • http://memokikadu.rf.gd/61278147222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2c4079-f177-46e8-9836-84b554a4cc66/dimojom.pdfIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 5324 bytes
SHA-256: 0386cb630816256b28d5a432990dd8014152588b64133e396ceed10285c2cd45
font_01_sfnt_off0000ffbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBE 13412 bytes
SHA-256: b7616672ce7f3c42ea0a5eb52f358fd88e5d6474f563dbbd6eaa053eefc65890
font_02_sfnt_off000127e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E6 10688 bytes
SHA-256: 2bd2c13e0d42b93e4b965a5867da8bd2814633a4be5a49608dda80debcef9cd1
font_03_sfnt_off00014caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAF 16172 bytes
SHA-256: 7f268005b80ff82e89639affb95403f55eddb42516abbde6a76e27226db124cd
font_04_sfnt_off000161cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161CD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_05_sfnt_off00016fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FCD 3968 bytes
SHA-256: 9dcc0b34f850d9a39c5f8549f6a0ca74cd2e4a9fe6fbbdf47d511b74d9e8002b

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