Malicious PDF — malware analysis report

Static analysis result for SHA-256 625e64868046d349…

MALICIOUS

PDF

100.1 KB Created: 2021-05-18 23:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7b419fcd1e974200f1b01848adda0de1 SHA-1: 4e96934630d21626e05d0b8cd8fa8c5f243608b3 SHA-256: 625e64868046d349f6e733ad61dac9430ca6e7bc111ee7d4afbbe59fd9375177
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or content distribution network. One prominent URL, 'https://lozipotod.ru/strik?utm_term=spider+man+comics+collection+download+for+android', is presented as a lure for downloading content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/strik?utm_term=spider+man+comics+collection+download+for+android PDF link annotation
    • https://kugatovobubusub.weebly.com/uploads/1/3/4/6/134680339/namot_jakuna_milizukaxoz_besalituzapewav.pdfIn PDF document text
    • https://kokonasaza.weebly.com/uploads/1/3/1/6/131636703/8553745.pdfIn PDF document text
    • https://denoxexulove.weebly.com/uploads/1/3/4/4/134457588/91f9d547600.pdfIn PDF document text
    • https://selimubujupaso.weebly.com/uploads/1/3/4/8/134847774/sipazobavimodewo.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
    • https://s3.amazonaws.com/nefunupu/bonus_bonds_cash_in_request_form.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/clerk_application_format_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/game_mirip_age_of_empire_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1031b6f-4947-4010-afc6-41c3e1d5ceaa/batigud.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/calendar_template_2018_word_document.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/porsche_718_cayman_manual_review.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/92857015615.pdfIn PDF document text
    • http://luxajoja.epizy.com/gikot.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/xetejogofirumi.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/tadixuwugasiz.pdfIn PDF document text
    • http://sonogobujajeva.rf.gd/battlefield_5_won_t_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/84868188617.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/adams_view_software.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/lazuteboguzitanisutepomo.pdfIn PDF document text
    • http://dowexibagodi.epizy.com/dowije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc686390-a4c0-4ee9-ab3d-42843fdb3648/mangere_bridge_dog_park.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/cash_flow_budget_excel_spreadsheet.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00010c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C52 5284 bytes
SHA-256: 102ca65253697f34b6c4e1a4bc6c65d3fdf7385507c2d71323e7c5373c60c2df
font_02_sfnt_off00011e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E28 2628 bytes
SHA-256: ad42f293ba804ce788bcf1520203f3c234411cb84f2d702d41b485b5ab63ae9c
font_03_sfnt_off00012990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12990 21972 bytes
SHA-256: 0399ec8de28c5667d63399e23cca638ff9d09bae6f6a2684c24ae75dcc916df2
font_04_sfnt_off00015c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C4B 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
font_05_sfnt_off000170b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170B5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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