Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e36f3d238649aea…

MALICIOUS

PDF

87.9 KB Created: 2021-03-25 11:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ff62167db56ba5b6989ed1c3ba10d1af SHA-1: eda1d328c6e92daca470cf048bebbe9abea78d50 SHA-256: 3e36f3d238649aea593c9da6d3665e685dee434ef37fe46a7c7b7cb236d33bb1
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('botokaw.ru') that is likely used for phishing or distributing further malicious content. The PDF structure and the presence of multiple external links suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/123?utm_term=information+blackout+meaning+in+english PDF link annotation
    • http://prostotit.site/vedabixijgcam4.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/albertine_kayp_english.pdfIn PDF document text
    • http://bigno.space/xovufadipavujotujametooo9g1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5fd9dcf80e197.pdfIn PDF document text
    • http://fit-italy.space/odisha_b._ed_entrance_exam_syllabus6anbj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531523/normal_60530b29a0057.pdfIn PDF document text
    • http://ericksandoval.com/990766670632kotv.pdfIn PDF document text
    • http://216tilford.com/bejimawopufodejawoli1gqt.pdfIn PDF document text
    • http://registrat.space/dadigukewebvk2o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_5fd26df364d0d.pdfIn PDF document text
    • http://pressit.space/surat_cinta_dari_rindu_candra_malikck3xp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409798/normal_60579d07ba8f9.pdfIn PDF document text
    • http://meetly.space/417539811964ssr8.pdfIn PDF document text
    • http://silvanozito.online/lugowu5riip.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
    • https://104e3d6a-8609-4a5f-ba89-88df40aeb326.filesusr.com/ugd/3cb22f_3e3db34b6fb94170b7444d51c8800672.pdf?index=trueIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_2a692281ab4d40599a66e35200ec0b87.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetevali/sakuzutavemewuzap.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/how_much_does_a_family_photoshoot_cost.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_252c753ff2b44ea392855710e2a05fa3.pdf?index=trueIn PDF document text
    • http://vakifavu.onlinewebshop.net/jojikolividukupobojoxida.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/how_to_find_area_and_perimeter_of_irregular_shapes.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/20421113031.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_1a2075ae29d14cfa870d9d5410d52804.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
    • 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_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 5436 bytes
SHA-256: b7a2ff42b753d058005c76c5212a1333dc28a8baa43359bb4720409daa9dfd19
font_01_sfnt_off0001088c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088C 8444 bytes
SHA-256: 4caea4b7efcb7364140757446a32c13e321d492a23a1a6530a017030f42db019
font_02_sfnt_off00012037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12037 17068 bytes
SHA-256: 8a60ddb3a6804b352dc6cc44c8b90bf65e06f507c31041b55922dd50515cde7e