Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e14e3e63bfa161…

MALICIOUS

PDF

67.6 KB Created: 2021-03-09 05:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58e4afae836ad36c79a546c5906e1325 SHA-1: ba8e695c47487c4e0121740d526a151bad88c9d7 SHA-256: 52e14e3e63bfa16165cadf03ac3a83f2cc42652a214f9a267276052ab2f88c4c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malicious intent. It contains a large number of external links, suggesting a link farm or phishing campaign. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=flex+gif+cartoon
    • https://cdn.sqhk.co/buwaxaxodi/Jgj9qjh/business_office_manager_sample_resume.pdf
    • http://devgame.design/37333887158vibm3.pdf
    • https://cdn.sqhk.co/xizefonuma/gjx7icX/63733382798.pdf
    • http://wapividazofar.scienceontheweb.net/fovilewa.pdf
    • https://cdn.sqhk.co/vilomikov/tAjjNpS/bubble_bobble_4_friends_special_edition.pdf
    • http://vipadminler.org/77363952737lr0x.pdf
    • http://zodajixinijetu.22web.org/zukepixizupog.pdf
    • https://cdn.sqhk.co/xonarewu/hfifB2U/77982618629.pdf
    • https://cdn.sqhk.co/mojikeke/GLbjdhf/34759061053.pdf
    • http://healthytrands.com/android_studio_install_sdk_23hnm1n.pdf
    • https://cdn.sqhk.co/rarinuva/rggibZk/57299005541.pdf
    • https://cdn.sqhk.co/vanatuwo/hjh2jdH/5912871893.pdf
    • http://geloritiveda.mygamesonline.org/50059019708.pdf
    • https://cdn.sqhk.co/fugovigul/mWhhjii/plants_vs_zombies_cheats_ios.pdf
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/rilax_vozegir_sobirisoxiged_siferonefez.pdf
    • http://giwosoto.sportsontheweb.net/65164481604.pdf
    • https://majojolug.weebly.com/uploads/1/3/4/5/134595566/3817694.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lazasubesuwup.epizy.com/kelvinator_electric_stove_manual.pdf
    • http://wugujub.onlinewebshop.net/tixifi.pdf
    • http://kagomovibinat.rf.gd/how_do_i_watch_acorn_tv_through_amazon_prime.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf36.bin
c94785f8a10598e87ada8f5b3c0cf9c0e9dea94919ca4a79807357ae181cfa0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF36 4892 bytes
font_01_sfnt_off0000dffc.bin
1900a31d47412590ac3bf8945b642af6d0dab94e95fba2a2a67f17c3ac76b3ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFC 9832 bytes