Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2128b7664b15b36…

MALICIOUS

PDF

98.1 KB Created: 2021-03-24 13:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 44a92fd78906356b4c42cb33f5c4eef6 SHA-1: 59546fa88cd58b7d4ac059dfde7867c7c7753edf SHA-256: f2128b7664b15b36fac9d51d5a872cd9967808f2dfd33a495da9b918d4312110
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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 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://soxebez.ru/strik?utm_term=are+ozeri+pans+oven+safe PDF link annotation
    • http://crispyset.online/college_basketball_schedule_today_on_tvhy29f.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/coIdPNa/download_magic_piano_dream_mod_apk_versi_terbaru.pdfIn PDF document text
    • https://widetidutu.weebly.com/uploads/1/3/1/4/131453832/1128888.pdfIn PDF document text
    • https://cdn.sqhk.co/tudosiki/a8Ugjib/aerosmith_greatest_hits_cd_cover.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/libro_mordiendo_manzanas_y_besando_sapos.pdfIn PDF document text
    • https://rutejiredoratel.weebly.com/uploads/1/3/1/3/131383841/cd48a.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/9fmVuid/51605009033.pdfIn PDF document text
    • https://vepenisa.weebly.com/uploads/1/3/4/3/134339982/4118223.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/hjojgih/57438595745.pdfIn PDF document text
    • http://mukovasisoro.mygamesonline.org/livre_algorithme.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/wumafalu.pdfIn PDF document text
    • http://reetodo.online/this_fleeting_world_questions_and_answersa1xx4.pdfIn PDF document text
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/3881167.pdfIn PDF document text
    • http://icub.tech/soxejebabokusiwufojos5ymrx.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/jKBBgiE/traffic_racer_download_hack.pdfIn PDF document text
    • https://tavutafaj.weebly.com/uploads/1/3/1/4/131482866/9500676.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/nefomojuwet/juxixekasenanuzeko.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/download_this_is_amazing_grace_by_phil_wickham_ft_lecrae.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/85066259264.pdfIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/nojogisuxonase.pdfIn PDF document text
    • http://xedemigu.atwebpages.com/alcohol_phenol_and_ether_target.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0001222f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222F 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off00013314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13314 4672 bytes
SHA-256: 9ff28efe008962be643161b407b8da598e86fa75e6019432bb17812683c2cef8
font_02_sfnt_off000142f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F9 11700 bytes
SHA-256: 90188a1851632296fc6b8412b0cfbfbe016940af24dff3fc511c2fd5c830884c
font_03_sfnt_off00016ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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