Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0358763f87c6af…

MALICIOUS

PDF

74.8 KB Created: 2021-04-05 00:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e343de3947350f5b82d592a29d79b9b8 SHA-1: 11b94eb503f91853decd358d09c39623714002b5 SHA-256: 4f0358763f87c6af1eb2af30e6d914223b1d7fc27f3e30b6a6f70f0f605783c5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a specific manual, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/wix?keyword=amada+band+saw+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/zevolazezag/VMggkWa/palabebo.pdfIn PDF document text
    • https://fulesinarube.weebly.com/uploads/1/3/4/7/134729099/vopepifolejinap.pdfIn PDF document text
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/xisusad.pdfIn PDF document text
    • http://shop-kid-toys.online/fozijusasowezefemajimamayo2pa.pdfIn PDF document text
    • https://sofeparevik.weebly.com/uploads/1/3/4/5/134517226/f35dfd7.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/nusewapitonusogujawibi.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/what_channels_are_included_in_comcast_packages.pdfIn PDF document text
    • http://kelnoteres.xyz/adobe_premiere_pro_mod_apk6ec88.pdfIn PDF document text
    • http://e-devletodeme.net/tuzopudomiluxd6h66.pdfIn PDF document text
    • http://xerijegodufiw.mypressonline.com/gift_card_holder_template.pdfIn PDF document text
    • http://aycotoro6.xyz/traducir_de_espaol_a_ingles_online_gratis0bic2.pdfIn PDF document text
    • https://jewanulak.weebly.com/uploads/1/3/4/3/134305347/zukizazovujaniji.pdfIn PDF document text
    • http://boxberry-24.cc/60140042616kys00.pdfIn PDF document text
    • http://waverufusufafuv.scienceontheweb.net/jabibeliwegeziwatigil.pdfIn PDF document text
    • http://tuzevijubozor.mywebcommunity.org/25392568341.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/ggUVBhh/jp_schoolgirl_supervisor_multiplayer_mod_apk.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://sreda.city/tijopipizabk.pdfIn PDF document text
    • http://obzorov.site/big_java_late_objects_2nd_edition5ffpv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nefigubisi.epizy.com/bosch_800_series_dishwasher_user_guide.pdfIn PDF document text
    • http://nisuzadusidu.epizy.com/fureto.pdfIn PDF document text
    • http://jawozamamopenis.rf.gd/ethnic_minorities_in_china.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_off0000e272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE272 5312 bytes
SHA-256: 5fcaf1301411e80b775e781b2ed5585a3eff20d821e21ab18bb1453529e906fc
font_01_sfnt_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 12036 bytes
SHA-256: 858ad579aa8aad036a25079064a4cae2491f8f2b53273848a69d86fcdffd47cc

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