Malicious PDF — malware analysis report

Static analysis result for SHA-256 440435519b180f2f…

MALICIOUS

PDF

65.7 KB Created: 2021-02-21 11:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 78fd40158afd3ca24983352a4b4493fa SHA-1: 3d3bc9c585ee444cb695ab5af4184e6366ec23de SHA-256: 440435519b180f2ff8f502aeea6bfafee44b064133a10c75f573c0b3869cd7be
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with at least one, 'https://baarspo.ru/strik?utm_term=what+does+a+health+and+safety+executive+do+in+schools', appearing to be a redirector to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'health and safety executive' roles in schools, aligning with phishing tactics.

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://baarspo.ru/strik?utm_term=what+does+a+health+and+safety+executive+do+in+schools PDF link annotation
    • https://mixifomako.weebly.com/uploads/1/3/1/1/131164472/e4954524bc.pdfIn PDF document text
    • https://gorenusedom.weebly.com/uploads/1/3/5/3/135326887/4037948.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/72060d331801ca.pdfIn PDF document text
    • https://fuliwerupemivu.weebly.com/uploads/1/3/5/9/135983247/a7a6b.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/892873.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/21739277f.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/votepoduvo-doginorebeje-juxejagekumul.pdfIn PDF document text
    • http://servisvds.ru/22714384429wv4fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463266/normal_5fcb9edabe3d9.pdfIn PDF document text
    • https://kinajerabisar.weebly.com/uploads/1/3/4/7/134748515/gugazaziletafaganaf.pdfIn PDF document text
    • http://blognews.top/nginx_lua_redis5zqpz.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/fajixe/appalachian_power_report_outage_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/48102904105.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/best_ppsspp_emulator_games.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/suara_cucak_ijo_medan_gacor.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/penelebireso.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_off0000c282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC282 5256 bytes
SHA-256: fd7258f13fa5fbcdae479f5fb36f569788a6cfceb6cc1ef073843320b0798e8a
font_01_sfnt_off0000d47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47F 10748 bytes
SHA-256: 1b3e704acd593c3be421c3df20d7844458092b9adf34003969ff343b73cfa403

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