Malicious PDF — malware analysis report

Static analysis result for SHA-256 848a0746c7a958f6…

MALICIOUS

PDF

90.9 KB Created: 2021-03-15 06:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1c89ed334880c89bc710383f9c38876b SHA-1: 4bb9db7ab4735a77f344544ab5b6696f6a4b2593 SHA-256: 848a0746c7a958f6b453f5da5c89728f8bf7ec9ad544fb4382439061fcef95fb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, https://soxebez.ru/award?keyword=alcides+arguedas+libros+pdf, is suspicious. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate a potential for malicious redirection or content delivery, aligning with phishing or malicious redirection attack patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=alcides+arguedas+libros+pdf PDF link annotation
    • http://rifimakegezibor.22web.org/domizuzanefene.pdfIn PDF document text
    • http://budonap.iblogger.org/android_sqlite_tutorial_step_by_step.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/regovadeje/i-_864p_federal_poverty_guidelines_2017.pdfIn PDF document text
    • http://pimifemegizak.epizy.com/8161676533.pdfIn PDF document text
    • https://ecf1b359-4982-44d9-836f-7e6f5fec4aa1.filesusr.com/ugd/da15c8_1b8c13b86b1a4e52961d5a46f30615ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/31268690232.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/flir_infrared_camera_one_pro_lt_ios_test.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/85474588638.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_5732ad68e5704d2eb5a7332037ae9376.pdf?index=trueIn PDF document text
    • http://pixipisifoxuj.rf.gd/uber_social_media_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c33287a-a655-49db-b0f2-01d78803d75d/nanodrop_spectrophotometer_prices.pdfIn PDF document text
    • http://paxovabaresubal.rf.gd/62903210193.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/does_mineral_wool_insulation_burn.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/android_toolbar_shadow.pdfIn PDF document text
    • http://novezepif.rf.gd/importance_of_research_reports_in_counseling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a879c012-4200-4328-a446-2c8501b2d6e0/93326371499.pdfIn 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_off0001216d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216D 5452 bytes
SHA-256: 46b60fdc1d3a1e38c4bdca85ac8287de10f69038b8153062602f99fae307f73d
font_01_sfnt_off00013400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13400 13124 bytes
SHA-256: 43782964ae706e0228c65e9a7eadf59f6e8db74cb03ae85a7ce4e79a56476fe3

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