Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d76b3628170a11…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 12:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b3cc9ae7cb6d503608995338bbc28255 SHA-1: b3e544c4ecba8ac5327419fecb97b3ddada7ddaa SHA-256: 37d76b3628170a1154eedd9e4b2660958fbb45517c7ff814914d983db2f79d84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, identified as a link farm, with a primary URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the PDF structure suggest an attempt to exploit vulnerabilities or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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=google+translate+english+to+parseltongue PDF link annotation
    • http://fetokoporumof.22web.org/vimolexipe.pdfIn PDF document text
    • https://cdn.sqhk.co/dubagojovo/gidrAyR/jijepagoja.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/0d9e97fcfe859.pdfIn PDF document text
    • https://gajerekore.weebly.com/uploads/1/3/5/3/135327587/3900995.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/iii6Ahf/mexivopo.pdfIn PDF document text
    • https://pirebuvix.weebly.com/uploads/1/3/2/7/132710697/e36a0ffe2885.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/ijG3foe/20175541726.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_d3c97bda954141df8caa02d9c220b8df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/focusrite_control_is_showing_no_hardware_connected.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/how_to_turn_on_jacuzzi.pdfIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_3da2e2b003c44a1f83addb252af78c89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/xunerigi.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_2b4a669a7460464da498e5bab310391f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/magazine_online_read.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/33276352697.pdfIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_620f820d51ea455f8f6a5db1a90586ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fofeguj/ridisiwupibetolalun.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/wewujosotevofetowaraf.pdfIn PDF document text
    • http://jilerixam.epizy.com/penisejewawidakevufonarol.pdfIn PDF document text
    • http://duxuramubot.epizy.com/interview_questions_to_ask_nurse_manager_candidates.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/60475759194.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 5112 bytes
SHA-256: 70ade0c74f6b3168d8f9fa69d8cf60f13dadf68b3d6aedf1b0b98eee66df6a71
font_01_sfnt_off0000fd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD41 10984 bytes
SHA-256: ff6c4336a8d5f70916a151b93da40bb8b79a20133f2fe74552da83e59c8330fa

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