Malicious PDF — malware analysis report

Static analysis result for SHA-256 755fcc59bcdb1d26…

MALICIOUS

PDF

77.9 KB Created: 2021-03-11 18:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 8b1e26e935e416ff452b69020e2bcf3d SHA-1: 4446b68f8c29645002df845a3139e9f53ea2cf35 SHA-256: 755fcc59bcdb1d26d6ca70f51e1fae82c14ba608c35a7fe87551a78e22a36428
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to S3 buckets, which is characteristic of SEO link farm abuse. One prominent URL, 'https://xezojetit.ru/wix?keyword=malwarebytes+premium+apk+3.4.0.3+download', suggests a lure for downloading software. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xezojetit.ru/wix?keyword=malwarebytes+premium+apk+3.4.0.3+download PDF link annotation
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/rorabekenazozi.pdfIn PDF document text
    • http://powerpoint4you.ru/521996267268mwn.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/meriv.pdfIn PDF document text
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/b283b6a.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/rupomisikiku.pdfIn PDF document text
    • http://vonexalux.sportsontheweb.net/microsoft_universal_mobile_keyboard_bluetooth_pairing.pdfIn PDF document text
    • http://tikovg.xyz/minn_kota_riptide_terrova_80_trolling_motor_w_i-pilot__bluetooth_-_24v-80lb-60_inchenxih.pdfIn PDF document text
    • http://bella24.xyz/rusuberenoduwekolerimenaubtia.pdfIn PDF document text
    • http://pink-echo.club/instagram_draft_location_androidlek17.pdfIn PDF document text
    • http://pipvip.ru/wukajoletunudalikobe4hjm.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/tikoweravisixu/35985387037.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/what_educational_psychologists_do.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/detection_of_aflatoxin_in_food.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/aromaterapia_egipcia.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/xadasulolanifilovebezapev.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/zesazigekomo.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/que_es_el_local_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/win_7_keyboard_shortcuts.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/24943922105.pdfIn PDF document text
    • http://zevusup.atwebpages.com/diary_of_a_wimpy_kid_books_amazon_india.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/38109756444.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/58500379398.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/83107404011.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/condolences_letter_template.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_off0000e4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 5816 bytes
SHA-256: c7483435e4fa92d0d583d3b00005cd12f1251a775a3f3b8dc4ae61592da72aa4
font_01_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 10240 bytes
SHA-256: fa4c56de5fbf17a7eda3154a4711794616d8b66876f8c5ef4f43c3b5296280a9
font_02_sfnt_off00011be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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