Malicious PDF — malware analysis report

Static analysis result for SHA-256 456e002d9a157f65…

MALICIOUS

PDF

68.7 KB Created: 2020-12-18 16:37:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 60d74dc70d6b6c6a7f075978c2e0f154 SHA-1: d691765be2c4f42fff40436336720af04ab6a1c7 SHA-256: 456e002d9a157f65639d3d4c6b6fd44d2bf00d7d3ffcac5a133db410a9ad30ee
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to an 'education submission form', which is a common tactic for phishing or malware delivery. The presence of external URIs and link farm characteristics indicates an attempt to redirect the user to potentially harmful content.

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
  • 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.
  • 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://trafficel.ru/strik?utm_term=boxtops+for+education+submission+form PDF link annotation
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/lusifikeji.pdfIn PDF document text
    • https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/6656192.pdfIn PDF document text
    • https://zepinimokibe.weebly.com/uploads/1/3/4/3/134373719/gigubosasoxigigil.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/242f910ac207f.pdfIn PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/1d24ce0200c.pdfIn PDF document text
    • https://piziruzebizopu.weebly.com/uploads/1/3/4/3/134350425/fuwamilisatug.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/6771efef-406b-4b94-88a2-147011f39a0b/anime_on_soap2day.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/lisuwajogeruf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54a5dc30a162e0c6f8caa/t/5fc6aee8e18c5c478ee81bc7/1606856432187/music_land_disney_youtube_channel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3421f85-f9f3-4f24-93ca-cc675fb2094d/gradient_theory_of_personhood.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/gonilodekokexujigizefixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647c00d4-f1ac-46d3-b60a-9fe15c50237e/earth_science_lab_manual_fourth_edit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83296883-1712-423c-8e67-2509b2fd54f5/h7_hid_bulb_adapter.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF2 5528 bytes
SHA-256: 1608adff80b2bca13f115839449260bd41e72032c2538e27aafdbdc0a85bcba0
font_01_sfnt_off0000e0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AB 10944 bytes
SHA-256: 85176d3796524ca5e39648161c3a55b60d196d454bb49ca76dfdefa30624409d

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