Malicious PDF — malware analysis report

Static analysis result for SHA-256 e703e27bcf92cd24…

MALICIOUS

PDF

83.4 KB Created: 2021-04-30 05:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e17bd5e01abfe567e7864ca4ace81c72 SHA-1: a98f919a7755453405d9c3f37858d8e81db1863d SHA-256: e703e27bcf92cd241c645615c9018b405a5d9fdb1ad79f9099d150c4d030edf5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam campaign designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to search terms, further supporting the lure of finding information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://zajinet.ru/strik?utm_term=how+to+find+the+p+value+from+t+table PDF link annotation
    • http://konadok.iblogger.org/what_features_of_traditional_african_music_are_evident.pdfIn PDF document text
    • http://xodokevazijif.22web.org/equal_addends_worksheets.pdfIn PDF document text
    • http://givavipuj.iblogger.org/near_doubles_worksheet_grade_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0524119b-9543-44d4-a9c1-6a2a85ae2681.filesusr.com/ugd/b12506_e890d5a8d8134b47a22044e2ed96e80f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a8da323-6c00-45d4-8de1-21ed6634ce7c/runazikutul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56af9fc-97e2-44e6-a7a4-3a4063c788a5/ruwojipodurusupunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72349205-fc22-41a8-8c88-951d98f145e3/26438712660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8817f0-8b7c-4863-8705-994e2ab2968a/wixovafelodorimowaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74462f8d-9f96-4d62-9b84-2558c6f14dfd/25392192312.pdfIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_eb0c859cc4224af9bc32ac6d98783851.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8776e2d7-ca9e-4054-9d63-403d1aa671b1/zoom_g1_four_g3n.pdfIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_c21499298f314fe89f402c4a130ecd42.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_1e446e38d5dd4f749e38e153d1406f1e.pdf?index=trueIn PDF document text
    • https://3df016ad-b40f-424f-9918-b96c60f46212.filesusr.com/ugd/387bfe_529296cc84c64445b133fe8d84956638.pdf?index=trueIn PDF document text
    • http://lebozid.epizy.com/happy_manila_song_all.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_d7edcbd3280e4a8b99c35a5e7ddbffaa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/783982a1-ebba-4e95-9fa0-fb94311d9fa2/93648708317.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_b7054255cb134e34a61e675c0d36910a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe591b2-89e9-4fb6-b957-a7e72f12feec/step_10_inventory_questions.pdfIn PDF document text
    • https://be5a03d2-cb36-429a-bb4d-4773f067dd3b.filesusr.com/ugd/b46ca8_3d50b1db3eb94881bec605f1103063ae.pdf?index=trueIn PDF document text
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_bfa17354a9f44186b2e9be984b124c0f.pdf?index=trueIn 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_off0000f86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86D 3392 bytes
SHA-256: 0d975f1cfe6301156ca9aceca18e44775856d16e024521965025390d1370fc48
font_01_sfnt_off00010489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10489 5356 bytes
SHA-256: be0e358bc1d28561447fe3aae6b985b3fe80362af923fb3fa5eac4a3b5e7fd25
font_02_sfnt_off000116a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A8 11948 bytes
SHA-256: a7ef2ed6a77081f8fb697c2dd05eb5ac018db4a49a6ee68d8764e349b16c58e6

Open this report in the interactive analyzer, or submit your own file for analysis.