Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3a7f76399552fc…

MALICIOUS

PDF

73.2 KB Created: 2021-02-28 13:25:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ffc04ac0d8e7878caf43cac5a7df95e3 SHA-1: eac2ae30b7fe040c8d74a6b9225ac9b7da68e0f0 SHA-256: 5b3a7f76399552fcb4491d4c5d1ec77f59a3095d69c494dfbea08fdaf3456f52
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://leonvi.ru/strik?utm_term=how+much+do+dbt+therapist+make PDF link annotation
    • http://ipatovaalena.ru/szckte_anlamnqih9.pdfIn PDF document text
    • https://tesazosutev.weebly.com/uploads/1/3/4/7/134714215/5861093.pdfIn PDF document text
    • http://beamorem.com/how_to_read_the_tibetan_book_of_the_deadzkcuc.pdfIn PDF document text
    • http://tekdouche.xyz/multiplying_rational_numbers_worksheet_7th_gradempzps.pdfIn PDF document text
    • http://detonicro.website/rori_raye_have_the_relationship_you_want_free_download9z3yt.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/152974.pdfIn PDF document text
    • https://jixivegeparimes.weebly.com/uploads/1/3/4/7/134749144/020400eb.pdfIn PDF document text
    • http://itasda.online/how_is_military_buy_back_calculated75pgw.pdfIn PDF document text
    • http://national-verifyteam.com/what_sentence_structure_does_yoda_usewahmx.pdfIn PDF document text
    • http://rusefogotomik.iblogger.org/zigozodaroguwu.pdfIn PDF document text
    • https://rijozixofufake.weebly.com/uploads/1/3/4/5/134509282/likiluw.pdfIn PDF document text
    • https://bowalizixoled.weebly.com/uploads/1/3/1/8/131872289/jusozupesij_sedobe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/satinek.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/lagu_bts_full_album_wings_matikiri.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/bible_verses_answered_prayers_niv.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/26091240378.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/faxupek.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_off0000e0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E8 5536 bytes
SHA-256: f7614d6baedfce1dc02fd9e43a9e5944a7ebc16dab0447e195fbabacb176fac1
font_01_sfnt_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 10884 bytes
SHA-256: 94e3960ddc221e83daaaef3ff5fdbaedf1d35e09985684cbc81013a3b5b01017

Open this report in the interactive analyzer, or submit your own file for analysis.