Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c15d0b22d4d2a6…

MALICIOUS

PDF

78.0 KB Created: 2021-03-14 05:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80ac5410db9f679ce6f497e510c2f2e4 SHA-1: 146e1dd146f4f6c9a55b4f3fcbeea03c1a645465 SHA-256: 40c15d0b22d4d2a65e1bf35465b9fed0d0172107cfa775b91f331dbb373ef7b3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are associated with SEO spam or phishing lures, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/wix?keyword=dbpower+dvd+player+user+manual
    • http://nurokojo.mypressonline.com/yaesu_ft-450d_qst_review.pdf
    • http://onlinesos.tech/comment_changer_les_touches_sur_robloxt1o90.pdf
    • http://smeshnoykir.space/tisugetenuwodiduo07u0.pdf
    • http://futajef.medianewsonline.com/stroke_causes_and_prevention.pdf
    • http://clientbluebadge.com/metodo_grafico_en_programacion_lineane9e3.pdf
    • http://naxajogilelog.medianewsonline.com/21029413292.pdf
    • http://sagunutu.medianewsonline.com/what_is_a_wod_workout.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/16ec9ffe-bc74-47f5-a31c-d86a29afe81e/model_number_for_maytag_quiet_series_300.pdf
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_9925044a486d4457b875ad13bdc3a2b3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/34a672fb-5fe9-490d-a07b-7aeab929ae4f/91129268281.pdf
    • https://uploads.strikinglycdn.com/files/af5de5df-8649-426e-827d-dc5671095152/how_to_program_a_universal_remote_magnavox.pdf
    • http://bixozebaxikapos.atwebpages.com/comptia_cybersecurity_analyst_cysa.pdf
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_8532dfcfd6804c668fc51426ac40588c.pdf?index=true
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_597010a8974b4ee6b33b2d8e39cd143b.pdf?index=true
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_030b48555d48475dbd3e75ea87e8b97e.pdf?index=true
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_b26e6e4cec084ba3b5e33333b2b84f3f.pdf?index=true
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_933f18f6ccd04d8f82eefe9dac8c4799.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d1d08503-045b-4e95-bfab-c520928dcb62/5109215963.pdf
    • https://uploads.strikinglycdn.com/files/16fe903c-c98c-428d-87dc-9a0462c779d1/tazisifobuxoruzo.pdf
    • https://uploads.strikinglycdn.com/files/4d3f8bfd-33e8-43c8-b947-156fb300580b/maths_formulas_and_tricks_for_competitive_exams.pdf
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_93e96881467c41a182ffecc878a2a13f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/81561414-1e10-4b36-be3b-427bf1091c05/is_arbys_fish_sandwich_still_available.pdf
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_1e2e8b8b20ab4d5eb22cefe2bb1c10d9.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_off0000f2ac.bin
092d47814e6e305b28dbbb02fd76d636adf392bd723aa0825c78826d3426fb8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AC 5496 bytes
font_01_sfnt_off0001055f.bin
a61e5812106d7bf1d0281b0218538633cc2359139df4489457120c1385ab50a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 10828 bytes

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