Malicious PDF — malware analysis report

Static analysis result for SHA-256 a238536357f267f1…

MALICIOUS

PDF

83.0 KB Created: 2021-04-20 22:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9e894dfa70d8fe7693e01b4b52c7c02 SHA-1: d73da77c68ab464be2d34c0430550ef6816a27f4 SHA-256: a238536357f267f1cd31738b48e8f6b166383319ffd1514724d5da1849365e89
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=positive+restaurant+feedback+examples
    • http://datingdate.site/what_is_a_critical_lens_in_literaturej03o2.pdf
    • http://copyright-help-report.com/spa_manager_job_description_templateli2gu.pdf
    • https://cdn-cms.f-static.net/uploads/4379626/normal_602c1aabcb186.pdf
    • https://cdn-cms.f-static.net/uploads/4501993/normal_60208a9a19c2b.pdf
    • https://cdn-cms.f-static.net/uploads/4409393/normal_606529c89e68d.pdf
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/81879fc34819489.pdf
    • http://natikolom.site/laxezenuwiqhk85.pdf
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/zusanifa.pdf
    • http://design-kvartira.info/konupojubobisogumomivujas3cb0z.pdf
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/f8adcd.pdf
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/664262.pdf
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/gadori.pdf
    • https://cdn-cms.f-static.net/uploads/4454281/normal_5fd980488fbb6.pdf
    • https://static.s123-cdn-static.com/uploads/4420018/normal_5fc74d19c0536.pdf
    • http://tularafujebok.iblogger.org/95339751073.pdf
    • https://wasexakenisopi.weebly.com/uploads/1/3/5/9/135982815/8513446.pdf
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/paxopoxawe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bufipevuril/cambridge_dictionary_offline_free_for_android.pdf
    • http://gesubonepalit.epizy.com/action_planner_bob_proctor.pdf
    • https://s3.amazonaws.com/ladiwuzetawedi/gutanem.pdf
    • https://s3.amazonaws.com/liwara/odd_and_even_numbers_worksheet_for_kindergarten.pdf
    • http://venumifulo.epizy.com/spiderwick_field_guide.pdf
    • http://vevubajiziju.epizy.com/76700312172.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f000.bin
01240976369c05c502e9e382a5eb6d4bb68a737d0ef687b96d850b4077238acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 5632 bytes
font_01_sfnt_off0001031f.bin
be7875f60cf0d25d2b54002db37836aeb9343a416d0a505799ac00f6d83f9cb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1031F 10824 bytes
font_02_sfnt_off00012888.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12888 16312 bytes

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