Malicious PDF — malware analysis report

Static analysis result for SHA-256 95256f756a0fa4d3…

MALICIOUS

PDF

86.1 KB Created: 2021-04-05 01:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5403ca6df780e16d11b212377c257409 SHA-1: 7d34ef3aab7fa6cff271e2626130c73296bbe0f6 SHA-256: 95256f756a0fa4d316fb9755c86caacf891dac5c054e62926c85b4e05487bd9d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://lozipotod.ru/award?keyword=2nd+amendment+worksheet+pdf', suggests a phishing or scam attempt by disguising malicious content as a worksheet. While no scripts were explicitly extracted, the PDF structure and the presence of many external links, including those flagged as unknown reputation, indicate a high likelihood of malicious intent, possibly involving the exploitation of PDF vulnerabilities or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=2nd+amendment+worksheet+pdf
    • http://romabeveseruzor.22web.org/bolobuwobi.pdf
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/3888830.pdf
    • http://vodabutopidaru.getenjoyment.net/21649182883.pdf
    • https://mewotevavaxaviz.weebly.com/uploads/1/3/1/0/131070751/9725577.pdf
    • https://wiwofuda.weebly.com/uploads/1/3/2/3/132303082/2e84cdce74f.pdf
    • http://xegazinijitup.mywebcommunity.org/candle_in_the_wind_1997_sheet_music.pdf
    • http://pifowovumuwe.medianewsonline.com/veil_of_ignorance_meaning_in_urdu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xujitezu/bc_spca_branch_operations_manual.pdf
    • https://uploads.strikinglycdn.com/files/2fe35d9f-28a3-48d5-9e1d-13f42546b0b7/portrait_drawing_techniques_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/108a9967-ff74-42e9-8bef-206fcd73ae39/90016375336.pdf
    • https://s3.amazonaws.com/fajetufekejo/gepegefategepofepinal.pdf
    • https://uploads.strikinglycdn.com/files/b423d1d6-c7c0-49d6-b42c-4d127e89a859/nizetejegebolefeje.pdf
    • https://uploads.strikinglycdn.com/files/227fa9da-ba17-4ad9-a94c-e3d3eb066611/46807557227.pdf
    • https://uploads.strikinglycdn.com/files/71e276dd-4e93-42ec-abf2-c8ee45b35b49/bivadimomabutep.pdf
    • https://s3.amazonaws.com/muvarelo/the_silver_chair_movie_review.pdf
    • http://fegoluvarelewum.myartsonline.com/46306371940.pdf
    • https://uploads.strikinglycdn.com/files/dd6a5c51-e010-4801-a24c-e8469ce5e573/rheem_water_heater_pilot_wont_light.pdf
    • https://uploads.strikinglycdn.com/files/0a1b4b4c-5f5e-4726-bfd4-825eced6b76b/13820124639.pdf
    • https://uploads.strikinglycdn.com/files/99c79746-dd48-4f58-bd2a-8d12716d1d61/ap_seminar_individual_research_report.pdf
    • http://nemunuj.rf.gd/google_docs_word_template.pdf
    • http://wuzuruwevirelu.rf.gd/oxford_phonics_world_1_workbook.pdf
    • http://delixerilebuk.epizy.com/pogixebofi.pdf
    • https://s3.amazonaws.com/somamere/nikon_coolscan_v_ed_driver_windows_7_64_bit.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e9.bin
8cfbe0378d0381b51bbc42f2e750cbe3d4b5506f05d863bc96aa51d07dc85f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E9 5180 bytes
font_01_sfnt_off0001155f.bin
022f088405bfe59b0c46c962ccefe84fe40c85007684c7c667c74a7e70ab81a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1155F 11516 bytes
font_02_sfnt_off00013cac.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAC 4324 bytes

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