Malicious PDF — malware analysis report

Static analysis result for SHA-256 64006f9b5881d441…

MALICIOUS

PDF

77.4 KB Created: 2021-04-01 04:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a93f23b6735ceac3e8761e7ef25f2eca SHA-1: 484da3044094adabe57ac264099cd49ce842342f SHA-256: 64006f9b5881d441aacb9c2a6518616b5496896ff5681e4a1e86f80a9d8a9a2f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one prominent URL pointing to a suspicious domain related to 'coin master free spins'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing malware. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/wix?keyword=coin+master+free+spins+link+2020+no+verification
    • https://cdn.sqhk.co/xibetevoxaj/jichhje/54570644083.pdf
    • https://cdn.sqhk.co/mujawiru/ZPidBji/besasanu.pdf
    • https://cdn.sqhk.co/vixemujomu/qjgwGgd/71934928387.pdf
    • https://cdn.sqhk.co/sowumavag/ie4ifig/63947154137.pdf
    • https://cdn.sqhk.co/zapimafe/Zgcghif/redbox_near_me_publix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2cf0a132-2d51-48d6-b7d0-4c9853ac7aa7/17952628761.pdf
    • https://uploads.strikinglycdn.com/files/e80449a4-28a9-4ac1-87e1-25262291a578/dupunixezeparizudukevexa.pdf
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_4fa813e65be64fb48e17a522b90b81c2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2508e431-9ca4-47a0-bd5b-82ef18986140/80949480775.pdf
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_d119037351464ca7928f6c3881484b98.pdf?index=true
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_c122fbab04bb4c1da3c7dbd602f0e8ad.pdf?index=true
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_f40512651b684ddbb6163b99040696db.pdf?index=true
    • https://uploads.strikinglycdn.com/files/197d9f4e-c405-4a6c-bc67-a9d0ccfb4d59/can_you_be_a_cashier_at_walmart_at_16.pdf
    • https://uploads.strikinglycdn.com/files/2bf5bfa8-8bbd-4316-aa0d-52a4356d948a/ap_psychology_unit_1_review_quizlet.pdf
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_feb7522ea4a8471c9e136da90ba0abf1.pdf?index=true
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_f1c11e9874894817b25350b1779d2db1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/387e51b3-72ad-4122-9f2d-80b76f061a61/rovovujonurimoru.pdf
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_f53c170cb6784e36bc432cc9ba40c46f.pdf?index=true
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_cf79f23a4e3e49368ba35df79fcec098.pdf?index=true
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_a950349ece9c49feb4db5f7f295a9f71.pdf?index=true
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_d486ce5f90324fa296960d98057ede83.pdf?index=true
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_4b84f9f555a742d8af87d6acac4d4822.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_off0000efee.bin
8b3175bdb0fb19e2c2368989694f9730c444ea409d0050d082ddd968f0522963		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 5464 bytes
font_01_sfnt_off0001026f.bin
49f9ffb52a1b9127bde431b9fffd41c543a81960c7d85f738384961d2cfb7831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 10876 bytes

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