Malicious PDF — malware analysis report

Static analysis result for SHA-256 d118350b059168c1…

MALICIOUS

PDF

80.4 KB Created: 2021-03-22 08:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2db5766048f9e63d1a1b2141613d0bf SHA-1: b35a71088b33412e1c59efc19013ff45b0ff46b3 SHA-256: d118350b059168c133f8d62d570b2e799de074cf13c3a07126a34fdf9749e9bd
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malicious redirection. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attack pattern involving luring users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=soundcraft+ui+software+ipad
    • http://gazajujana.mygamesonline.org/jami_al_bayan.pdf
    • https://cdn.sqhk.co/rojozedofaf/cUXhaBW/phrozen_virustotal_uploader.pdf
    • https://cdn.sqhk.co/wupofolizaj/Oghjiih/sexually_transmitted_disease_infection_cdc.pdf
    • https://static.s123-cdn-static.com/uploads/4486566/normal_5fcf502655eba.pdf
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5fed9075a8e0b.pdf
    • http://ravovenovibu.medianewsonline.com/kuwibafuvuxo.pdf
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fe460a9368df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9556e7e0-0f31-4efe-bebc-ed06add195d8/the_mama_natural_book_review.pdf
    • https://9e6c4f0b-3406-4274-bf8a-5be7f948d240.filesusr.com/ugd/45c6ff_ae600f2262a947a8bce2bfb351e1e441.pdf?index=true
    • http://zagofij.onlinewebshop.net/allen_major_test_series.pdf
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_4ecc88157ed44276878a48b0433a946b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ad5ea2d3-a185-44bf-aa56-95e414d3dc5d/how_to_use_my_omron_pedometer.pdf
    • http://viwuwijagabote.myartsonline.com/39403830120.pdf
    • https://86a6be6f-1c3f-48a2-98e5-8a654ddc1212.filesusr.com/ugd/027f51_3c7cc1e2435648a2b586c3dd9a31f423.pdf?index=true
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_4a9867f65d2e4cd39854fb069ea194d4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fafaf959-43cb-42d1-a34d-74a47721da0d/jejevevupabozi.pdf
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_4778f74522d84456a70c63a2c66925e5.pdf?index=true
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_2451185b9bd949c6adbac2940a0ca978.pdf?index=true
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_10b5bfc29c72475d841fc7075e6156b2.pdf?index=true
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_4a07894f849b412498030b9ce844b385.pdf?index=true
    • https://uploads.strikinglycdn.com/files/429098dc-fe7f-400e-b7e3-fa3a2cfd0001/oracle_12c_sql_tuning_-_the_ultimate_guide.pdf
    • http://tikimiwuwal.myartsonline.com/khalifah_dinasti_abbasiyah.pdf
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_bc84103b7bba454f8f9dbeb53ec61229.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb1c.bin
6078054a3d8491f93a2d2f6d13bfd654789e91c509d3746580993f154a5a65f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1C 5312 bytes
font_01_sfnt_off00010d53.bin
59f36c52a7b1deb0ae10c9e32e8c0af3df87c88136a7ef7e54685dadba5db9a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D53 11400 bytes

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