Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e874d0016bd482…

MALICIOUS

PDF

83.4 KB Created: 2021-03-03 22:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 31a9b82109f3c32bb69355538de5c591 SHA-1: 8a533692b379be92e7ea7b31c69322474e4ec92a SHA-256: 90e874d0016bd48226453542f7d6830564418bf610e955cfcf3a1b299e479b3b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://lozipotod.ru/123?utm_term=dark+force+rising+plot+summary PDF link annotation
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/fopujabig.pdfIn PDF document text
    • https://renijavodis.weebly.com/uploads/1/3/4/7/134709946/dobuxetawokaboz.pdfIn PDF document text
    • https://wolafufep.weebly.com/uploads/1/3/5/3/135305459/zefegulunumi.pdfIn PDF document text
    • http://vakoxojokovuvi.iblogger.org/lulebosilo.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/2616830.pdfIn PDF document text
    • http://zupedaganivo.66ghz.com/pronunciation_guide_italian_words.pdfIn PDF document text
    • https://xununurolaweb.weebly.com/uploads/1/3/4/6/134673503/gesotugepamek.pdfIn PDF document text
    • https://gofupadosu.weebly.com/uploads/1/3/4/8/134853885/7c00469ccf.pdfIn PDF document text
    • http://rugozuravonabib.22web.org/single_bed_sheet_cotton_online.pdfIn PDF document text
    • http://wavokumad.iblogger.org/new_latest_bollywood_movies_free_2019.pdfIn PDF document text
    • http://mosoxiliraf.iblogger.org/apartheid_era_in_south_africa.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/salade/zalodumoba.pdfIn PDF document text
    • http://molodetagako.epizy.com/95566306209.pdfIn PDF document text
    • http://pixagikaw.epizy.com/wipotomepijopejijazav.pdfIn PDF document text
    • http://judowasejalux.rf.gd/5472242656.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/mla_format_annotated_bibliography_formatting.pdfIn PDF document text
    • http://savewimaxanuf.rf.gd/cima_p1_study_text_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/14733741864.pdfIn PDF document text
    • http://gaxodusipif.epizy.com/academia_premium_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/aisha_film_video_songs.pdfIn PDF document text
    • http://muwalolerede.epizy.com/construction_site_monitoring_report.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB38 5060 bytes
SHA-256: ec90c8a7f6970c3264ca7ba170f702f0dbc079eabd6871bfb98c08e9e191b9a0
font_01_sfnt_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 5384 bytes
SHA-256: 2ce001241adb92de1055ccdcad98432ec54a3a39242c740aa739eded4fb5889f
font_02_sfnt_off00010f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0C 10052 bytes
SHA-256: 3d734bf1c676e95247cd6c69308160f2827d080ba2e900cee6248f3e1d9266df
font_03_sfnt_off00013186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13186 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361