Malicious PDF — malware analysis report

Static analysis result for SHA-256 681921cff2eb1a07…

MALICIOUS

PDF

112.5 KB Created: 2021-04-06 11:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dfced981ab5bd0445b630a0f4e04f7d SHA-1: e7d9e72e07ce1ed06d72ed297aa84c00622e48ee SHA-256: 681921cff2eb1a07397285c42b677d1a24177edfc48303633939176eef058497
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://dafemum.ru/strik?utm_term=ibn+al+arabi+books+in+urdu
    • http://tiwelonepozafuw.iblogger.org/jugekivafofufutem.pdf
    • http://vijasoga.22web.org/tupifenijaba.pdf
    • http://gta-msk.ru/2004_dodge_ram_1500_short_bed_for_sale7oc9e.pdf
    • http://visujoj.22web.org/apriori_algorithm_in_data_mining_with_example.pdf
    • https://fizexafotunuguv.weebly.com/uploads/1/3/1/0/131070009/savuneximek-vodiw.pdf
    • http://mscredit.info/zolerijijibopusizovesoneeaqco.pdf
    • https://gikanirirexenad.weebly.com/uploads/1/3/0/7/130776133/4cdf3de.pdf
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/7354358.pdf
    • http://apkweb.net/integral_of_cos2xsinxt6btt.pdf
    • https://gefetejumifigo.weebly.com/uploads/1/3/4/6/134688955/558c0b.pdf
    • http://totaxusozavu.sportsontheweb.net/research_article_writing_format.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xapidajovaji/55910618536.pdf
    • https://uploads.strikinglycdn.com/files/1d6d4342-a475-4c05-976f-4a5e761bc4e4/how_to_teach_word_families.pdf
    • http://winimoviwimi.myartsonline.com/basics_of_electronics_engineering_free_download.pdf
    • https://uploads.strikinglycdn.com/files/2346d265-a3a9-4b7e-981d-0d12c20f5fb6/xotoravukitelonopofag.pdf
    • https://s3.amazonaws.com/sasufufa/93093797825.pdf
    • http://lakumufo.epizy.com/transistor_switching_circuit.pdf
    • https://uploads.strikinglycdn.com/files/2122fca1-bbd7-4a22-80cb-772da8a20fbe/what_is_a_non_linear_plot.pdf
    • https://s3.amazonaws.com/gulapore/39444808108.pdf
    • http://kezasifofajimo.rf.gd/72286825672.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00018b17.bin
b3a9d420ab1c893ca06493818fc4ffe8c222f0fad817610f92e19cb2f03bdb80		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18B17 23728 bytes
font_00_sfnt_off00014c71.bin
cae77926c828620f33bcffded62cb59299db9e608059ee95c632ccb1d3a9791c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C71 4960 bytes
font_01_sfnt_off00015d58.bin
d0d0d615b573e5486b0b41e2abf3e1bdea9e3f1818aa3b3e9cba73578740d4f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D58 15700 bytes

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