Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0bea17a061d422…

MALICIOUS

PDF

76.1 KB Created: 2021-04-08 13:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 16eb31e18d63c13069116706ba61fc62 SHA-1: c3c73ccdc629e92c84953b9f8b1459e142f34d3c SHA-256: 5a0bea17a061d422de743c024f598224c5973796687ccef90d5b8d4e4fcc029b
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically targeting a 'brother laser printer hl-2240 driver download'. This URL redirects to a disposable hosting domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a second-stage payload or phish for credentials.

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://seumenha.ru/strik?utm_term=brother+laser+printer+hl-2240+driver+download PDF link annotation
    • http://copyrighytsupport.com/lifejiwijemebuxepaxil3jmy.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/psat_algebra_practice.pdfIn PDF document text
    • http://runolive.com/eventide_h9000_pluginqzllq.pdfIn PDF document text
    • http://bozesedixek.mywebcommunity.org/periodic_table_of_elements_updated_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/ibhazMO/96166156242.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/honeywell_hyf290e_quietset_tower_fan_review.pdfIn PDF document text
    • https://dilopapavi.weebly.com/uploads/1/3/4/7/134705518/670359fb.pdfIn PDF document text
    • http://car-test.pro/49334095463m0qmt.pdfIn PDF document text
    • http://freefire-gifts.com/atwood_furnace_part_31150hrai8.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/ifqnUdE/hexa_jigsaw_puzzle_apk.pdfIn PDF document text
    • http://bafalumej.iblogger.org/gijofolalewuju.pdfIn PDF document text
    • https://didaripetog.weebly.com/uploads/1/3/4/6/134685212/4041013.pdfIn PDF document text
    • https://ganegekisawaji.weebly.com/uploads/1/3/1/4/131406809/roxezozozefu_xamugadugedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muxoduxomupaja.epizy.com/dremel_4200_collet_change.pdfIn PDF document text
    • http://tukozadagafewan.rf.gd/complaint_form_template_html.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/best_price_bushnell_trail_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/43728963396.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_off0000ebc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC8 5640 bytes
SHA-256: 20a524a1d062e0c9c0e9ebe4f31748640673f25aed65f1c205927e1fec2ff092
font_01_sfnt_off0000ff18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF18 10672 bytes
SHA-256: d18598fcc1a1b7237f7309ced678d08e7631f4452371038a2c07388c8cbdc145

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