Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37dd508e108e014…

MALICIOUS

PDF

82.5 KB Created: 2020-11-24 13:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 05759a74e8c33e653e2fa9232c2f6575 SHA-1: 94fa6b30be604555324b56a7bed7d1b0adc6fbbf SHA-256: e37dd508e108e0142f7c0fa5b404f19a093bcbc3e04c7982e9aaa1d7fd932e4a
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least two identified as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were extracted, the PDF structure itself facilitates the attack by hosting numerous external links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?utm_term=chaap+tilak+meaning In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_5f99cc9e58d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f8750f027f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f887557cd2dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447885/normal_5fb70d10ee779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f87a14a808ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f89c3159437e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f8cc937762e8.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/5011974.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/smite_version_mismatch_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d613e8-fde0-46ec-ae87-171dc7f1b37d/89785338737.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/delete_duplicate_photos_google_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/empanadas_colombianas_77063.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/corn_dog_in_air_fryer_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/raviga.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/95019121192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61410a51-4aa7-4b0b-a273-f79b591f44e0/9828061500.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 4928 bytes
SHA-256: f6e220a4f65c144ad60fad7ec858007b64e86ca60fda2d55a9eb2ff45b73dc68
font_01_sfnt_off0000ec65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC65 3772 bytes
SHA-256: e2c7bb3c6d2fbc6b9680c858ce58af9e5cd0e4fbc18f33bdd2ad1d5654d08a87
font_02_sfnt_off0000f809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF809 10772 bytes
SHA-256: 19e91c5c028f8bc5c8142fcf1ca47b32a7f13804bbd1e0808fc5800b90099179
font_03_sfnt_off00011ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE0 9000 bytes
SHA-256: c618e6356a9e547f2c1b5471c2cc097e6c3f01b7a51c084fdb6a078425667496

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