Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4eb491ca53cf46…

MALICIOUS

PDF

72.4 KB Created: 2021-03-17 13:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7281358e1223162c0e8022e376d74209 SHA-1: 789b50eb5b1133bbf924e2886128058fe8484f95 SHA-256: 7d4eb491ca53cf468af6ee1d1dd7825231c60d8dfe820ab323cc87b85cc153fc
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a large number of external links, many of which point to suspicious domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the idea of a lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://druttle.ru/award?keyword=1001+arabian+nights+pdf+free
    • http://webcam-model.online/12147542825dc83h.pdf
    • http://lnstagramcopyrighthelps.com/burger_king_breakfast_hours_weekendg8hv7.pdf
    • http://arthromedshop.xyz/89536421588e6b0l.pdf
    • https://sudejewakigalo.weebly.com/uploads/1/3/4/0/134040490/5439463.pdf
    • https://kuvomudoriri.weebly.com/uploads/1/3/1/4/131406544/3e059fad831c10e.pdf
    • https://wulakeda.weebly.com/uploads/1/3/4/5/134592464/napovetefuwubu_bojuvotibore_lidupu_narun.pdf
    • https://fexegidonowagi.weebly.com/uploads/1/3/5/3/135325594/3802165.pdf
    • http://basiditdcf.space/defirezagusaninoxiwoziniwf59ii.pdf
    • http://damvglaz6.xyz/37882387383al4pt.pdf
    • http://parkji5x.xyz/casio_watch_aq-s810w_manualrb7km.pdf
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/5608384.pdf
    • http://interplast.ru/785124358868lcne.pdf
    • http://copyright-helps-team.com/how_to_follow_agile_methodology_in_project19p4h.pdf
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/9070473.pdf
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/vibapasopu-koxajededoturar-fotavut-nulifurixuwabe.pdf
    • https://tovakuroxi.weebly.com/uploads/1/3/1/1/131164121/wixezof.pdf
    • https://pufodafu.weebly.com/uploads/1/3/5/9/135959320/wufajudu.pdf
    • https://tupinikuwexopej.weebly.com/uploads/1/3/1/0/131070806/jixasar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xeroguru/spring_mvc_tutorial_gontuseries_youtube.pdf
    • https://s3.amazonaws.com/vatosolikijike/46re_overdrive_rebuild_kit.pdf
    • http://jagogapibibolin.epizy.com/nivojovipasilidabumonid.pdf
    • https://s3.amazonaws.com/werowibovezoje/15072434652.pdf
    • http://niwuganol.epizy.com/north_arrow_clip_art_free.pdf
    • http://jefefudutumoki.epizy.com/34414710710.pdf
    • https://s3.amazonaws.com/wuvepilamamuse/78973080367.pdf
    • http://nimukefamax.rf.gd/sobotta_atlas_d_anatomie_humaine.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_off0000dbf5.bin
a78939c35cb1ee93e257902f79c4b4d4382d55f37ce3ca087a36fffb00920f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 5512 bytes
font_01_sfnt_off0000eea1.bin
cab128897102e1b590b8ef0fbd1b4c3c056c442d5668fc9fa0ffc2fec6968125		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA1 11164 bytes

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