Malicious PDF — malware analysis report

Static analysis result for SHA-256 3437b0f4ea8e4cb7…

MALICIOUS

PDF

112.3 KB Created: 2020-12-31 16:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f40f355ba6132ce424de7f467174650b SHA-1: 78649e3a23a1716a962671b8fcc810d95af1a8ef SHA-256: 3437b0f4ea8e4cb78f07a6f4b9ea69615ee806d74ebc8425e8adf5fa865af0e4
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to popular media, likely as a lure. The embedded links, particularly the one to 'traffking.ru', are designed to redirect users to potentially harmful sites, indicating a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffking.ru/strik?utm_term=naruto+shippuden+ultimate+ninja+blazing+wikipedia In PDF document text
    • https://vavetupabon.weebly.com/uploads/1/3/3/9/133999816/9015468c33b6.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/gid6Nhe/75564824045.pdfIn PDF document text
    • https://jamexujibelesuw.weebly.com/uploads/1/3/4/7/134748805/naxiruwalajabit.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/iDhibhh/40695287807.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/734fd1a7-8db2-41f6-a360-5dd3e520d65f/tunux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6690e339-bf7a-468b-a580-75194be710e3/michael_jackson_thriller_zip_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2222a2-0121-4428-8932-1539a6e2f90f/sosedup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72112461-dcde-418f-a527-b6a798081dc4/tobepanugol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb83c5e-f71d-4493-a070-ba6bc4b852a6/shikai_cbd_cream_whole_foods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f938e21a-c7d5-4322-8e43-3b0395903189/85773903575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66753c4e-e5a2-4817-82dd-46cd51dd1930/bokaxufazowakifaginuwap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8488895e-c816-4d40-ba69-82ada1e0941e/vivitar_aeroview_drone_assembly_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/agneepath_movie_songs_320kbps_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98285284-597c-4a65-a8c0-19ecb81eb32c/zugupelixebiwuvelev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e653b2-5aab-4d2e-ba86-4a4a8699abf7/brown_v._kendall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96757a4e-ed0e-45e2-8472-ac21edf9b607/integrated_algebra_worksheet.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000137c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C1 10792 bytes
SHA-256: bf6891ad0843acf8caf9ae431db494de3d7f50545079cfaf5a8dbd270f1ef0a2
font_01_sfnt_off00015b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B19 5644 bytes
SHA-256: 41cce9dd20819501d5aabdbb0bf25fd493e6df64dc5cff9579b725a0f37323e2
font_02_sfnt_off00016e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E28 6064 bytes
SHA-256: 2477e0df9b39af1d00c9cc27629e3f698053f9f1eadc0b465711b4ef1e381bd4
font_03_sfnt_off00017daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DAF 11492 bytes
SHA-256: 736af2163b6f5d8c31106c004c546b8b45e49886ff9a64e73d6ceb47acdb5183
font_04_sfnt_off0001a458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A458 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34