Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5661114486492e…

MALICIOUS

PDF

74.3 KB Created: 2021-03-09 10:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6abe67bb44b6f05b16488ede2014388e SHA-1: 964d754b2c069654731a241eaa68c42530d37348 SHA-256: de5661114486492ee8d19ec4cc9297cf5b28fffd6d0b0efe79cc322a1f544c3e
184 Risk Score

Malware Insights

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

This PDF file contains multiple links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to medical information. The presence of embedded URLs and the heuristic firings strongly indicate a phishing or redirection attempt designed to lead users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=bronconeumonia+infantil+pdf In PDF document text
    • https://wobikuneli.weebly.com/uploads/1/3/2/7/132741052/afa83a4.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/fejumevixitoba.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/iegecgf/12596315533.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/j8jc1jh/app_for_fox_bet_super_6.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/656e68b2552.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/LPM9iec/impossible_nine_2048_puzzle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivekutunuji.rf.gd/weight_loss_tracker_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/meaning_definition_of_academic_performance.pdfIn PDF document text
    • http://nufaviziziji.epizy.com/turn_on_guided_access_iphone_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/392db4b8-c35d-4523-a503-364a1aa9d83f/cheap_eyelash_extension_classes_near_me.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_1c721666925c4ab3bd77a5d78c17c048.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezorito/hayabusa_gi_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d198f032-b083-4468-934f-ff883397f606/adler_held_that_exaggerated_physical_deficiencies.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/pemudolalutavutumevazude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6495c6-ac20-4c9b-ac57-9b18b1d736e7/40852342033.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_ebb106ee54e342deb6db2c496a4e5ae3.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 5172 bytes
SHA-256: 4ab7de1f408d394aa82324c3c7b43de86cc4d43317fb72cef4e4dbd010f542b2
font_01_sfnt_off0000f9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FD 10128 bytes
SHA-256: 09bd4be68a760fa7ee3a2f6168bf248031f692d844de45a987edcf210fd00a33

Open this report in the interactive analyzer, or submit your own file for analysis.