Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7ba5feac2d5adc…

MALICIOUS

PDF

83.0 KB Created: 2021-03-17 20:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2e4f27426ce1a9da7d7e85bde0765373 SHA-1: 77e01bdf8ec2f275fbfe03d50eb951171952d918 SHA-256: 9b7ba5feac2d5adccbf0f869eacc6771aff65215a4893d86ed483d6d04ee6e0b
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=halo+the+fall+of+reach+pdf PDF link annotation
    • http://fuxewofuwikafu.iblogger.org/arabsat_channels_frequency_list_2020.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/ti_82_calculator_games.pdfIn PDF document text
    • http://zafotebobivet.iblogger.org/79800290692.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/marofedagesagirogolak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakavogulogij.onlinewebshop.net/70071644883.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_a1dac830642a4690863d73fb0e7a2174.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/06741418-97ef-42fe-8080-bbd55f792eb2/can_you_day_trade_bitcoin_on_coinbase.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/astm_a572_grade_50_specifications.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_0b7d3f02ebff4ebbab5f38af91ce573f.pdf?index=trueIn PDF document text
    • http://vowojuxibaxo.myartsonline.com/xekejakolovemetagit.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_0edb11c2ad6e4091995d0efb44cd2296.pdf?index=trueIn PDF document text
    • http://gadoxijumulop.epizy.com/innocent_man_ost_album.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_3e24bb77cfdb4d238629ad813fab50e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/lotro_beorning_tank_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/fort_hood_shooting_2009_after_action_report.pdfIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_6259e16e4a064c1ebd1be6a28b70281d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c923065b-d120-4b88-921b-30bf315d5513/how_do_i_love_thee_poem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e5455a-e874-4fc3-8ef9-b8df6bdfe879/46883641985.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_3474141f483a434dafe9f51437a9f64a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pujinit/blacklist_season_2_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0607aaf0-f6c3-4b03-8416-1f55b5b9198c/chemical_bonds-ionic_bonds_worksheet_key.pdfIn PDF document text
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_28863d8621af4393accaa14061410247.pdf?index=trueIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_82dc1ae1ed474214a7093858cdbedd3e.pdf?index=trueIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_e33df5dd79d44fd5a4b190d0d82c9f30.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_ddc830a29daa46c09f896241d6850e48.pdf?index=trueIn 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_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 5028 bytes
SHA-256: 942364de1818756663767fd1df959a3916e11c5e63e9dab1bfafcb8f4a8fb3a2
font_01_sfnt_off0001188c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188C 11220 bytes
SHA-256: cac48b405bff80316328ea926ae1aa2138c3c7a4e4985fbcb1f435abc90e2388