Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e3ad4c7d98ca6c…

MALICIOUS

PDF

84.2 KB Created: 2021-01-04 16:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 915ea2a235a436b8be4398c402d2399b SHA-1: 163bd9faa8f598d2dd17c4db7ab29cf5fbe18ae9 SHA-256: 88e3ad4c7d98ca6c5e081322e5a271a61955bdbba12d741e395bd58248c5977d
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=spreadsheet+compare+2016+crashes+windows+7 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369768/normal_5fd077c9ee79f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_5f8cfd38e2203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5f90b55a71fff.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/nezanurugega/american_funds_simple_ira_distribution_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed929135-1a4c-41a3-b18f-0ebc151ffbd5/simcity_buildit_hack_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/xitetijor.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/47573425975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327dadcb-db7e-4c7d-89be-5624c0fba517/57093119969.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/rational_functions_asymptotes.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/fire_alarm_system_design_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb60d20-321d-4ce1-8a29-c54d982aa22e/gta_v_apk_download_for_android_without_verification.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A6 6036 bytes
SHA-256: 70c2682851db1dd930da50f41cf50eac2661652d95cb4f5bbad624a83d1dbeb2
font_01_sfnt_off00010923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10923 10804 bytes
SHA-256: 5c3e2118eede33270d846c059c9e5b4ef46c8eb8f6a17050609cc2e652462a06
font_02_sfnt_off00012e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E16 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15