Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74a43ae896798de…

MALICIOUS

PDF

75.4 KB Created: 2021-03-04 15:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 25c6cc920447db4bf57f5a1c642ae73b SHA-1: 947614353638f4ff3ba9856a83dcc626e2c9d4f8 SHA-256: a74a43ae896798debc21db1688983f7b9c76596acf094b7dfb2b7b5631851ed1
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://crophysi.ru/123?utm_term=shimano+ultegra+di2+front+derailleur+spare+parts PDF link annotation
    • http://pezesukuju.iblogger.org/tivesefef.pdfIn PDF document text
    • http://bigakeka.iblogger.org/7705996861.pdfIn PDF document text
    • https://siximegam.weebly.com/uploads/1/3/1/4/131453251/2798306.pdfIn PDF document text
    • http://rinobozawizuvew.iblogger.org/4504448145.pdfIn PDF document text
    • http://tuzurew.iblogger.org/susumokaxikexovexutiw.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/dupanowir.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
    • http://xezepagonozaniw.epizy.com/silent_hill_revelation_parents_guide.pdfIn PDF document text
    • http://sasozazanixe.epizy.com/79574927153.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/bovagij.pdfIn PDF document text
    • http://pogosib.epizy.com/tibikuxes.pdfIn PDF document text
    • http://diretivik.rf.gd/bloodborne_defiled_chalice_guide.pdfIn PDF document text
    • http://depepok.rf.gd/lg_top_load_washing_machine_tub_clean_function.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/punjabi_dance_video_songs_free.pdfIn PDF document text
    • http://lapefub.epizy.com/laraderovumaxesutajezod.pdfIn PDF document text
    • http://fojiguxojed.epizy.com/zosibugofuwobilamusiti.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/67128167681.pdfIn PDF document text
    • http://naremijex.epizy.com/ezdrummer_2_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/formal_email_asking_for_a_job.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/android_change_device_model_name.pdfIn PDF document text
    • http://boxogegifenefi.epizy.com/object_oriented_programming_language_concepts_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/vitalesiwujoduwikebekibo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/45713052339.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78E 5572 bytes
SHA-256: df52dcd62c3164f8b9762211a6dc97424eebaa21a2e721015323b1dd817d7380
font_01_sfnt_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 11380 bytes
SHA-256: b8dacbeb3bf3ae4d1d68761e1abcc646608489a8f76f1414fe461ba9e42b00a1
font_02_sfnt_off0001112e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34