Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e0a322ebdb327b…

MALICIOUS

PDF

121.8 KB Created: 2021-03-18 08:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8d7e4d2551b1a23bb954adb7193cb7a6 SHA-1: 51cfaed488966834028dc06140697b82666ef41e SHA-256: f4e0a322ebdb327b6c522f222539894989a1ded4a10d56f2b811a55160476159
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://soxebez.ru/wix?keyword=wide+sargasso+sea+pdf+penguin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387417/normal_6035160f22029.pdfIn PDF document text
    • http://sendgrid-de.com/nidabenifixifasarozosib6c3k.pdfIn PDF document text
    • http://kemytbok.xyz/brother_ce8080prw_reviews88cth.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486548/normal_5ff04410244e3.pdfIn PDF document text
    • http://icub.tech/how_to_fix_acer_laptop_preparing_automatic_repairdztaj.pdfIn PDF document text
    • https://cdn.sqhk.co/tarudifirew/ggicZig/youtube_vr_videos_oculus_quest.pdfIn PDF document text
    • https://cdn.sqhk.co/fololekumi/uibgggj/mafobizafonetexesave.pdfIn PDF document text
    • http://bigmagazin.xyz/why_is_my_nespresso_blinking_yellowftua9.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/8iafQgh/22310653803.pdfIn PDF document text
    • http://geekcods.com/bavawl2zck.pdfIn PDF document text
    • http://matrixbicycles.com/xibotamonugv65lv.pdfIn PDF document text
    • http://helpcenter.business/degekowiwowapatekala4qd2z.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/data_structures_and_algorithms_in_pythono2w7v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480585/normal_604314e5b77ee.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/vl4hdie/boom_beach_statues.pdfIn PDF document text
    • http://esclub.pro/animal_tissue_culture_techniquest1t14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475872/normal_60435d573cf4d.pdfIn PDF document text
    • http://com-connexion.xyz/7082918770072vaj.pdfIn PDF document text
    • http://nopisodozig.66ghz.com/k53_learners_questions_and_answers.pdfIn PDF document text
    • 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://vigaroxirari.epizy.com/honda_gx390_service_repair_manual.pdfIn PDF document text
    • http://wiluxejixaraz.rf.gd/95832123749.pdfIn PDF document text
    • http://davejizejago.rf.gd/18463297914.pdfIn PDF document text
    • http://jipowefata.epizy.com/48804483096.pdfIn PDF document text
    • http://vapamul.epizy.com/68343864169.pdfIn PDF document text
    • http://vetageluzox.rf.gd/oster_bread_machine_manual_5821.pdfIn PDF document text
    • http://firuxafuxu.rf.gd/66753902256.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EFA 4992 bytes
SHA-256: 1e7872cfd9f89a5e2c6f09583b8960e2093e4317694e3df7ed0e96920c2d50d0
font_01_sfnt_off0001a00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A00B 11992 bytes
SHA-256: de600e849d00810619b2284de1e35f29a6d9ebd8e2b3e2f8eb09c6520213b74c
font_02_sfnt_off0001c8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8CE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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