Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4cd6322a7cd7fc…

MALICIOUS

PDF

76.0 KB Created: 2021-03-05 18:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6bd2d12eee905a5a0d377c19468733bc SHA-1: 8586df93ab0f2abac8be6b1d8ef2bf29ee4bdb69 SHA-256: ae4cd6322a7cd7fcf02a4abeebb365b0b631a7e9b7b4d445e3516d04fc6e9e51
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a phishing or scam campaign. Heuristics confirm it's a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely as part of a spearphishing attachment delivery chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wix?keyword=red+panda+food+web PDF link annotation
    • http://sovuradema.medianewsonline.com/levererisikotiwosaweg.pdfIn PDF document text
    • http://vsspb.ru/xijumonurozibowulibshy9.pdfIn PDF document text
    • http://citrus-fruit.space/29615681326gmtzh.pdfIn PDF document text
    • http://kfcrabota.ru/how_to_put_a_knot_in_your_t_shirt6lezl.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/codigos_para_control_universal_isel_u-47_hd3osst.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/what_is_the_theme_of_the_poem_kubla_khan.pdfIn PDF document text
    • http://swiss-gear.store/105355487678t0kq.pdfIn PDF document text
    • http://eurofamily.pro/frigidaire_mini_fridge_retro_pinkzxrzt.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/4yIjigh/likert_scale_survey_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/7Vgclii/wewurag.pdfIn PDF document text
    • http://merishwheelrecords.com/26629466116z3bhg.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/musical_scripts.pdfIn PDF document text
    • http://megalit-korolev.ru/stocksubmittertblnu.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/cgipogj/27556812427.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/GXgmKig/plant_science_journal_impact_factor_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/fVYAgeX/90548212028.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_d53b0ff4feab47b1992b7be202aeca1b.pdf?index=trueIn PDF document text
    • http://firiwigisu.atwebpages.com/jokunemulupoj.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_aeb6b8f03dcc4d2a9ea8fff2ec4f1bf5.pdf?index=trueIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_93c25939383b4b3eaf65e44b9ed9c635.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 4968 bytes
SHA-256: 5eaf4255279dd44475b283d9636147ad3ff1892ac3068bf9000b11c1d24745e4
font_01_sfnt_off0001001e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001E 10264 bytes
SHA-256: 02878f9eba819cb512013347df27e989424c6aaab305a02d2a12c7a552a5cd34

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