Malicious PDF — malware analysis report

Static analysis result for SHA-256 67438455b3432db1…

MALICIOUS

PDF

77.4 KB Created: 2021-01-04 18:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 930f7f1f73afda8888312482998b4235 SHA-1: d85890d3100ed3d73a9829fb6552d363a11b8539 SHA-256: 67438455b3432db1790396a2e274b34983d1f49072d8e6643da6ee1ef44f754e
222 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'traffmen.ru', indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/aws?utm_term=selfie+camera+photo+editor+app In PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/2f1b23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fc92355c432f.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/gdieJgX/photomath_app_download_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fded78-bccb-4c81-9045-ae662643e403/7821396577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40be8e5e-cc3d-49dd-8bbb-60996fe3e708/fawozivirowum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a30f108-ca49-444e-a98b-22069ac62774/prentice_hall_united_states_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fb60e1-b193-42dc-ae3c-ac6e6fce250e/zebixegerisonewesotek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf693ce5-b021-42cc-b1e3-f10b32427a70/learned_vs_learnt_australian_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4361e07a-c28a-4b9c-bb04-7e6814d6f867/shortcuts_enter_the_gungeon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224e7e60-7385-41a2-84f6-9b72b9902f14/trim_the_ultimate_manicure_system_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7bea9c-4d30-4efd-9f05-3d1e850aa8c8/xotuzexageliduva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d6a5aca-9480-4177-b769-080a4b039fc3/22678874641.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 3220 bytes
SHA-256: 2eafb78263b957cbc5a8cbdc482c6e0e160326e3c94edb7ff63dc66a50697da4
font_01_sfnt_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 5320 bytes
SHA-256: 62e06d8c625b41212f0c94561ea759b0e63ace38c3ed9e74a912e060e44e214b
font_02_sfnt_off0000ee15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 10788 bytes
SHA-256: 96a01c2c030f081b9ece3807dbdedb208f554b7c9df62c0b0ff3288965d7ca1a
font_03_sfnt_off00011348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11348 16092 bytes
SHA-256: bfc441d837b7b3b6e145db50ef40ca26079b22b75b7d4883bc21c88ef510c1a9

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