Malicious PDF — malware analysis report

Static analysis result for SHA-256 0925b32a48615eac…

MALICIOUS

PDF

75.3 KB Created: 2021-04-06 23:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6d8c0519ce72803811191df3e37b75d3 SHA-1: b7337196ff128a199fc8ba0993d40df6862a1856 SHA-256: 0925b32a48615eacf0de48e09ce61d9e8ea6f5ce851cb2695c9af82a9a86bd8d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs point to external resources that could host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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.
  • 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://jottigo.ru/strik?utm_term=how+much+does+army+reserve+pay+a+month PDF link annotation
    • https://cdn.sqhk.co/jabosuve/sAhcjcW/zuvivexidumovifilik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500186/normal_60400315a2729.pdfIn PDF document text
    • http://difulomutanuv.iblogger.org/ganawoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392215/normal_6003986879472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5fd175ff9bc29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_605a37a501be5.pdfIn PDF document text
    • https://cdn.sqhk.co/gabogivoxavi/qmif9hc/buruniso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_600d8aa967545.pdfIn PDF document text
    • http://bamasadukarudam.iblogger.org/australiansuper_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/xavejapati/RZggbgd/80027444892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481059/normal_6056f9ef287fb.pdfIn PDF document text
    • https://muwefojiginilu.weebly.com/uploads/1/3/4/5/134512592/94c522a.pdfIn PDF document text
    • https://damafofazawarag.weebly.com/uploads/1/3/4/3/134369947/be6b42f102e6eb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466657/normal_6057a1852a906.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/fKfNght/grand_vegas_crime_city_apk_download.pdfIn PDF document text
    • http://fomamiforepu.22web.org/end_of_year_reports_examples.pdfIn PDF document text
    • https://xidifapub.weebly.com/uploads/1/3/0/8/130873728/c1f7e900a09dc2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nawupewiviziwik.rf.gd/spider_man_3_ppsspp_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/genero_literario_de_la_obra_los_crimenes_de_la_calle_morgues.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/69963426122.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/three_levels_of_government_canada_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/biblical_hebrew_vocabulary_list.pdfIn PDF document text
    • http://xojaxalevigob.epizy.com/first_day_of_school_2020_florida_hillsborough_county.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_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 5496 bytes
SHA-256: 6370238a19f1a58c3f18230774827a827be6cba1b625365139f0dcddd479adca
font_01_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 10548 bytes
SHA-256: bb53d8194c8eb3f413a1ffdcee59ad55960aa6d67c9a3656449f80adc5e34ccf