Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e310bc053bb269…

MALICIOUS

PDF

83.2 KB Created: 2021-03-22 00:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02069e8775b1daedb19ddcf9c53144ed SHA-1: ea211e3aba726d779c95b70ca714fed539b96e77 SHA-256: d7e310bc053bb26949e15da70b4a8e12c4fbbe3af132761397ee0382a410fa14
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 numerous embedded URLs pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'mod apk revdl' and 'wkhtmltopdf', indicating a potential lure for software downloads or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/wix?keyword=home+design+makeover+mod+apk+revdl
    • https://cdn.sqhk.co/fusozuwalas/cJNMPgf/bubble_shooter_7._039_apk_mod_hack_download.pdf
    • https://juvuxoxeziw.weebly.com/uploads/1/3/4/3/134313380/ribarojijijiro-tuzonu-guronisajub-beritar.pdf
    • https://kagiwegelugamed.weebly.com/uploads/1/3/1/4/131453087/1877777.pdf
    • http://retoxen.mypressonline.com/anatomy_and_physiology_of_pain.pdf
    • http://fonexewof.mygamesonline.org/expositor_s_bible_commentary.pdf
    • http://fipupibiveni.iblogger.org/android_studio_master_detail_flow_activity.pdf
    • https://cdn.sqhk.co/wedowetaso/ghgdK7u/mefapewenubitigajerafoto.pdf
    • https://limavewudadeku.weebly.com/uploads/1/3/5/3/135323498/gezamovubu.pdf
    • https://satufimitu.weebly.com/uploads/1/3/4/7/134715308/wofemogalu_tuwaxi.pdf
    • https://cdn.sqhk.co/ronofumito/dGib9gj/12642571415.pdf
    • http://tideparipawovu.mygamesonline.org/kovudanigekedir.pdf
    • https://cdn.sqhk.co/gowamojon/8DFJgj4/mekorama_all_levels_unlocked.pdf
    • https://cdn.sqhk.co/tuponapalab/m1adI4d/97393660872.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tobikinos.onlinewebshop.net/32924110583.pdf
    • http://tefetuzuzip.myartsonline.com/aligning_with_your_core_values.pdf
    • http://xologikaju.atwebpages.com/asi_hablaba_zaratustra_resumen_por_capitulos.pdf
    • http://kipixuge.epizy.com/act_practice_free_study_guide.pdf
    • https://s3.amazonaws.com/satuja/66399606787.pdf
    • https://s3.amazonaws.com/dukexajuj/lesorat.pdf
    • https://s3.amazonaws.com/bogijexu/s2_netbox_extreme_default_login.pdf
    • http://bajipogijos.epizy.com/cavernous_malformation_brain_surgery.pdf
    • http://gozosowizopuk.rf.gd/baidu_translate_english_to_chinese.pdf
    • http://titugol.atwebpages.com/27018410604.pdf
    • http://molobexe.rf.gd/rudifinumowikuxapup.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb6b.bin
79227a9f89c64a39623f4aab32f702cb78658c880486999d7e767e8b4f2cb1ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 5072 bytes
font_01_sfnt_off00010c8c.bin
2806cf83e8a5dc6c3aee78b93030f7c996dccf39bc56fce2f9d0b9c114fd8fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8C 10852 bytes
font_02_sfnt_off00013125.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13125 4324 bytes

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