Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c774625af7f006…

MALICIOUS

PDF

71.2 KB Created: 2021-03-11 10:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0f134f0489f970442671a328202b48c5 SHA-1: bba306d53a70eb93d102f9e0c04a9b4118670047 SHA-256: 40c774625af7f006b33b669e6888f2c7d6e8bb5ead845c96e78def21e095d534
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 0.9996

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://gimoguvi.ru/strik?utm_term=netgear+gs105e+reset PDF link annotation
    • http://sijazoge.iblogger.org/catalyst_9400_sup_1_datasheet.pdfIn PDF document text
    • http://mantenancie.com/1565103601r6oq7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5ff411419d19e.pdfIn PDF document text
    • https://pegujugadul.weebly.com/uploads/1/3/1/6/131637136/7965644.pdfIn PDF document text
    • http://good-production18.site/abstract_reasoning_practice_test_with_explanationuya28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487903/normal_60129b3d6aa8a.pdfIn PDF document text
    • http://gawolesimavuvad.22web.org/4180692495.pdfIn PDF document text
    • https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/zorozowawopumuviwa.pdfIn PDF document text
    • https://xobijuveja.weebly.com/uploads/1/3/1/6/131606615/6da77.pdfIn PDF document text
    • https://dakawomafi.weebly.com/uploads/1/3/5/9/135959339/gufaluxukoxeme.pdfIn PDF document text
    • http://meetchambre.xyz/zadazume57u1y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mogazijanadoro.rf.gd/jokekejiridasaneniso.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_690164eef1df42028cf2a80b31a96dd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defujo/gasuduzapexazepenugezoru.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/ncert_full_form_wikipedia.pdfIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_c4c0ead223414d43ac15b3cf65dd3994.pdf?index=trueIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_89c47ca007fe41009c817622f2ada0ed.pdf?index=trueIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_3bc8b39617304bcc9ad7eae7d606935a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sojaxub/zizoginibevekuj.pdfIn PDF document text
    • http://jafolofip.epizy.com/nidumorivewifijekif.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/intermatic_raintight_outdoor_timer_manual.pdfIn PDF document text
    • http://dobozuva.epizy.com/63209104808.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_off0000daa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA5 5108 bytes
SHA-256: 8f034b8ace38f93c692501536113867748ced182caa388450fb9506251c81131
font_01_sfnt_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 10396 bytes
SHA-256: d17d8a00bf78e8fd13e61dcaecfa61511f7d5cdbea4c48bd08775aa1801bb4a0

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