Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d38e1a4668411e…

MALICIOUS

PDF

79.8 KB Created: 2021-04-06 08:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ba462f4695f0a4f1324f100543a93037 SHA-1: 5b966e722bb33a4285b5bb4483d0143caf310e15 SHA-256: 57d38e1a4668411ea94cc0adac25cc908522fc3c54274265cc471a3c6e03c20b
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many hosted on disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier output strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/award?keyword=chicago+apartment+lease+2020+pdf In PDF document text
    • https://cdn.sqhk.co/letopoto/FIsMNih/jowubi.pdfIn PDF document text
    • http://mmeueue.space/nikabobixezoexwrd.pdfIn PDF document text
    • http://1xbet-registrat.site/gewozez1fmlm.pdfIn PDF document text
    • http://spencermcman.us/71584433916apdk6.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/ehe8ihO/ice_cream_sandwich_nutrition_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/pirates_of_caribbean_piano_sheet_music.pdfIn PDF document text
    • http://justamorem.com/download_99_names_of_allah_mp4_sami_yusufhpqwm.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://obzorov.site/95858036738plsbo.pdfIn PDF document text
    • http://lusuwivaw.medianewsonline.com/91892295755.pdfIn PDF document text
    • http://wofurasosezisax.mywebcommunity.org/jetutomesubukuwesizixe.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/xoxanisisijutenobuyhfnm.pdfIn PDF document text
    • http://petonopelun.iblogger.org/what_is_the_best_boy_names.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/3gghhwt/lego_batman_dc_super_heroes_apk_revdl.pdfIn PDF document text
    • http://sallely.xyz/compute_the_number_of_units_in_ending_inventory_on_march_31guk5u.pdfIn PDF document text
    • http://bio-ita.fun/93714429354giti7.pdfIn PDF document text
    • http://lokotahas.ru/cvs_wrist_blood_pressure_monitor_error_codes_e5sqb9r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bukuzagalu.rf.gd/acute_liver_failure_guidelines_2017_ppt.pdfIn PDF document text
    • http://wafubarig.epizy.com/70482753117.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_off0000f848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 5748 bytes
SHA-256: edc9e350bc7d385fa07637c69168b08fee046e14a0ac3e4b1470b32c49abb833
font_01_sfnt_off00010ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA9 11188 bytes
SHA-256: 0bfa65d312603bbd27b298dc0851b6bbbf1bfa1c5db670757ef89b8e15b3be26

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