Malicious PDF — malware analysis report

Static analysis result for SHA-256 12eca203f0251aca…

MALICIOUS

PDF

80.8 KB Created: 2021-02-22 04:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3664339bfddfb97fd6e0c1c1f3791cbf SHA-1: 597fd1a3bcd62f8662cf7cedb955a129015bfe50 SHA-256: 12eca203f0251acaed7cc396bdfe16565b8c9708fb9ff98d7bc8fab0ad13c61b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'bologen.ru/strik' and another to 'reduslimitalia-oficial.site/4853774648nnn0y.pdf', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a malicious intent to use disposable hosting for link farms. The ML classifier and ClamAV detection strongly support the malicious verdict.

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://bologen.ru/strik?utm_term=husqvarna+435+chainsaw+chain+tension PDF link annotation
    • http://reduslimitalia-oficial.site/4853774648nnn0y.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/aIhbJvO/pulsera_smart_samsung_galaxy_fit_lite.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/ohjhjea/40403479308.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/VjcjaFD/lucky_dozer_coin_pusher_apk.pdfIn PDF document text
    • https://jefabulovonaju.weebly.com/uploads/1/3/1/4/131438419/retawode.pdfIn PDF document text
    • https://bovakexigi.weebly.com/uploads/1/3/5/3/135314068/dukorujilufim.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/gugakezew.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/ghxwhgR/pawukepiwajakimeluse.pdfIn PDF document text
    • https://kagukemo.weebly.com/uploads/1/3/4/8/134884413/1046835.pdfIn PDF document text
    • https://fafenerukore.weebly.com/uploads/1/3/1/3/131398145/2c4a83e406f9.pdfIn PDF document text
    • http://mafewagidimu.22web.org/raksha_bandhan_film_songs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://vefolex.rf.gd/devumo.pdfIn PDF document text
    • http://vufuxit.epizy.com/adding_binomials_and_trinomials_worksheet.pdfIn PDF document text
    • http://zitoveruvet.epizy.com/win_10_bootable_usb_software.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/reformas_borbonicas_sociales.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/kolkata_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/38922993583.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/31625466523.pdfIn PDF document text
    • http://zufimot.epizy.com/machine_shop_equipment_safety_guidelines.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 5468 bytes
SHA-256: 84cb1bff6eac95998cb0d1bbf43a008e07af5636d271210f0b600ddec892fd5b
font_01_sfnt_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 6068 bytes
SHA-256: d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0
font_02_sfnt_off00011331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11331 10260 bytes
SHA-256: c0944f9bb7950a8d7c058df4e6c7a47c3c18eb6369256691430412eede68ba30

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