Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dc2758073d33ae…

MALICIOUS

PDF

73.4 KB Created: 2021-03-03 15:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e74911f32aea618e75b5740bf0dd3a9f SHA-1: baa6edfc5e1a67e030a75a9f605064ed62261b96 SHA-256: 38dc2758073d33aea02f4ecebf7467ab4963656988c9a6b9f3f234b73e3ffe88
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains a deceptive lure related to a biblical topic to mask the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=what+is+fire+according+to+the+bible PDF link annotation
    • http://floradoma.net/60386134589owcsc.pdfIn PDF document text
    • http://formblckr1.xyz/dryer_sheets_alternative_sploofpnn5r.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/giIUe5d/26904476525.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/iihdphj/diwaloxujezuge.pdfIn PDF document text
    • http://zepiteravan.22web.org/divuvarosegutapugetinefe.pdfIn PDF document text
    • http://ultra0.space/46816764550yokw6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_600c201c79070.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/Naqihih/change_eye_color_photopea.pdfIn PDF document text
    • http://24goodstore.site/vonizenokabudonlb6zr.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/CvAKiir/46299611741.pdfIn PDF document text
    • http://salonvarna.com/60851273394u4yyd.pdfIn PDF document text
    • http://lastasked.com/april_2019_act_test_answers3l2bf.pdfIn PDF document text
    • http://christmas-gift.ru/3859795475it57v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407989/normal_5ff8eea4ec74a.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/mojivikapeti/believe_me_young_dolph.pdfIn PDF document text
    • http://tefolinum.epizy.com/sovajezezoti.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/6790464402.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/beechen_cliff_sixth_form_term_dates.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE069 5436 bytes
SHA-256: b61b585925cc813bf65ad16f0c8f822049f044ae330e661544e17a187526a3e1
font_01_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 10868 bytes
SHA-256: db6be7b030970a567beb36cad285761f95c952819c9302054f6ac5e11e1f73d5

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