Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f49932ac8865e1d…

MALICIOUS

PDF

77.6 KB Created: 2021-03-14 08:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 22e179043a1c21d93019a3b7e77f4f87 SHA-1: cd524f8c9b61ae852fcb4a484d7d030f1c4571c8 SHA-256: 3f49932ac8865e1dbccb2fecf593b7f57d4c11a3361af53232f0ec8de0184611
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and link farms, strongly suggests a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to 'funny soccer fail gifs' and authoring application details, which are likely decoys to mask the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://maypoin.ru/wix?keyword=funny+soccer+fail+gifs PDF link annotation
    • http://tasunixupowife.66ghz.com/40296147607.pdfIn PDF document text
    • http://reactivaperu-2020.com/broadstone_air_mattress_replacement_partsicyot.pdfIn PDF document text
    • http://gakofanotizukab.22web.org/meaning_definition_of_accounting_information_system.pdfIn PDF document text
    • http://centerverifybadge.com/lake_erie_perch_fishing_report_monroejunx8.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/hve6Zih/7607843307.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/86560574277.pdfIn PDF document text
    • https://cdn.sqhk.co/mevexobuzur/Usghjhd/17374582178.pdfIn PDF document text
    • http://lulelege.iblogger.org/laziness_in_the_bible.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/jegjBVa/witikipomewobi.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/66203034698.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/zilomodegijowedugax.pdfIn PDF document text
    • http://tugokutuli.scienceontheweb.net/titubivezixerolidakugod.pdfIn PDF document text
    • https://cdn.sqhk.co/samigimas/ijjiEji/viraribiliva.pdfIn PDF document text
    • https://cdn.sqhk.co/fotajoge/idtkdBl/24857052502.pdfIn PDF document text
    • http://all-system7.xyz/57927665798f3ep1.pdfIn PDF document text
    • http://meinekarten.best/non_allotropic_forms_of_carbonh9ij3.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/hjajcTG/labexew.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolegu/6MViahe/nintendo_switch_online_play_animal_crossing.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/lEpigha/forgotten_realms_timeline_by_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6d406a-d844-406d-8995-715f092c46c1/vapesatabuvinenune.pdfIn PDF document text
    • http://fegubitexore.rf.gd/sisodefuxememejid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/513ca2bd-c3c8-4fbc-8dc8-dd5d087485ea/jlab_jbuds_air_executive_true_wireless_earbuds_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8ffe92-3e69-45bf-989a-bfc7076a37d2/how_much_is_jason_kennedy_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b257be4-5004-4a27-a15d-e142f804b4fb/11699761193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f5e13b4-fd1e-4a6a-b8dd-1bf3ce41f343/what_is_the_best_coin_operated_washer.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 5108 bytes
SHA-256: dc7daff5510e478b75f39c0df1cfb8aa267bce02fb5ad8b3796207e637bd12e2
font_01_sfnt_off00010043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 12068 bytes
SHA-256: c35ea98041697040f2c262b00295f7ffcfee2a9aad88bcaeebb8a95cf2718cd5