Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c710fce896fb8e…

MALICIOUS

PDF

68.4 KB Created: 2021-03-14 01:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 748c6a9507c3b8993874c0efdfa616f8 SHA-1: d008ec8f000e8df0965f3b138814aacfe894c6ce SHA-256: e2c710fce896fb8e47ce83b6293f27b17e74fc4f076d914b240c32beb3c38e96
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt, with one URL specifically matching the document's apparent theme. While no scripts were directly extracted, the PDF structure and the presence of external URIs are indicative of a malicious document, likely used as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://golowaki.ru/wix?keyword=chapter+8+sensation+and+perception+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/xexerekija/eghgfm5/the_crown_queen_s_racing_manager.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/sipezev.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/jchhujd/midunogusarapojasimomegok.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/ghajd9c/chop_suey_system.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/pilijozu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_146c428a7ceb48df96637c3ea3cd23c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/block_strike_mod_apk_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3775fd1-244b-486f-acf7-084297700202/vicks_vaposteam_ingredients.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/graco_pack_n_play_playard_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/etiology_of_congestive_heart_failure.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/pet_answer_sheet_reading_and_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/how_to_make_a_write_up_report.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_1f95cc9aa91846de98e1bce9a88dd760.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8865858-71a9-49bc-b621-d3bc0f98fee4/can_you_play_ps4_games_on_vita_anywhere.pdfIn PDF document text
    • http://suduxegowur.onlinewebshop.net/32866640213.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_d12870f28cca4f0b8aed3d0d0c3f43e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/what_is_the_meaning_of_s_promise_ring.pdfIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_593e07c43e9f41cda0971042bc329e3c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE02 5384 bytes
SHA-256: 666be7d289815205f567ff6639a727b318e218afec1ebe86d3ca57aacb324bbd
font_01_sfnt_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 9932 bytes
SHA-256: 0592b954d7f5f1610e1f8bc2614b45c5a526e0d12a4a25c58059d30a0fbca7f5

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