Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2b8dc2f5ff9fd0…

MALICIOUS

PDF

84.5 KB Created: 2021-03-19 22:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2d5bd8c87f425690bc7b3a3353c68206 SHA-1: ee4ff844f9b3ea38b2afa2afe16f9b8bcf31fb60 SHA-256: 7f2b8dc2f5ff9fd0055f0cbd813a8c2a8ae2992c66c3bde2fe012774196daaaa
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The presence of external URIs and a 'download button' heuristic suggests a social engineering attack aimed at tricking users into downloading further malicious content. The document body is heavily obfuscated and unreadable, providing no direct textual clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=romance+debussy+sheet+music+pdf PDF link annotation
    • http://wifejopoxakobo.iblogger.org/mikilosatetawodozexo.pdfIn PDF document text
    • http://zufuruz.22web.org/49729893870.pdfIn PDF document text
    • http://ramerofebib.iblogger.org/viluvibaka.pdfIn PDF document text
    • http://santaparker.store/huskee_viper_tiller_manualxr5es.pdfIn PDF document text
    • http://jelesanu.iblogger.org/national_geographic_magazine_articles.pdfIn PDF document text
    • http://idealica-co.site/33650388274bvmdm.pdfIn PDF document text
    • http://sevelorovuwo.66ghz.com/jmj_school_paschim_vihar_admission_form.pdfIn PDF document text
    • http://jesofazom.iblogger.org/brightness_app_for_android_free.pdfIn PDF document text
    • http://balifruit.com/bijexulefimejinof5zrgv.pdfIn PDF document text
    • http://kavuxolabazili.iblogger.org/65669288460.pdfIn PDF document text
    • http://tuworiki.22web.org/78091228073.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://koriwiginajefet.epizy.com/me_gozare_en_tu_presencia_jehova_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/wotapawebije.pdfIn PDF document text
    • http://fatekikatamepis.rf.gd/87107697443.pdfIn PDF document text
    • http://pemusowujim.rf.gd/18270877655.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/ravag.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_098d0e67f4fe4d9e9f4536b8080133bd.pdf?index=trueIn PDF document text
    • http://figadadir.rf.gd/sujisupidivewutozud.pdfIn PDF document text
    • http://xifenarubomes.rf.gd/adana_demirspor_forma_2018_satn_al.pdfIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_25381470651c4961beabdd8580396269.pdf?index=trueIn PDF document text
    • http://tazolupiviroliz.epizy.com/business_card_scanner_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/laxogagumemegap.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_e3568f34ab6b408cbec68b6dc4b45c5f.pdf?index=trueIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_607728c1e80a49ae932bf1ef9a93d68d.pdf?index=trueIn PDF document text
    • http://daxevekiwenux.epizy.com/joxewik.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_571344f8ad544d8ea47a96de75c96edb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomudufe/yosemite_private_tour_guide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F0 2912 bytes
SHA-256: 1dc4d53cc543180180c31573cc7ff31d5166e80dfe0f7d334e321c19e224dfc4
font_01_sfnt_off0000fb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4B 5396 bytes
SHA-256: 3f7bee0b9f1de1735a8986e55af42500bb9d654c88edabdfa2dd565e9d26a5df
font_02_sfnt_off00010d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D81 12100 bytes
SHA-256: fda2fb341f77d1e1f02817d35db02de6884df8ed71b00e5abb648476889cc83f
font_03_sfnt_off0001354e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1354E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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