Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5ea70b411e9c47…

MALICIOUS

PDF

77.0 KB Created: 2021-03-08 06:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d0349d3805974bdb23d410cea8d656a SHA-1: 17692d89410349559ee555c0ec38a26a0ba8be15 SHA-256: 3e5ea70b411e9c4703c44f8efb1bb21bf60d61362e86c6edb2da5a9a8c61aff7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on dynamic DNS or free hosting services, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://golowaki.ru/wix?keyword=pcl3+lewis+structure+bond+angle
    • https://cdn.sqhk.co/mopijiluxu/jiVK8Qe/duck_hunting_boat_lights.pdf
    • http://hookup754.fun/how_to_write_in_file_online_freeawkao.pdf
    • http://disclosures.space/atlas_pass_v3l12ta.pdf
    • http://zabavnyi-slon.ru/80496281822n07nc.pdf
    • http://reduslimitalia-official.site/how_to_read_an_ebook7enyh.pdf
    • https://cdn.sqhk.co/kefekawit/iaGjhio/theme_park_simulator_switch_steuerung.pdf
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/3151664.pdf
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/fejiror-xovaruvuxepa-fofosedes.pdf
    • https://bovimifukid.weebly.com/uploads/1/3/4/8/134882826/9643993.pdf
    • https://loniforuwo.weebly.com/uploads/1/3/4/9/134904684/tuguxibesamovufo.pdf
    • https://lazidejapagopi.weebly.com/uploads/1/3/4/8/134891766/wuwino_zavugujimike_sowararosivitov_nixidilobu.pdf
    • https://cdn.sqhk.co/jolodovi/glMW8ij/22593425781.pdf
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/lovaridob-naseledifenada-nazemabo.pdf
    • https://cdn.sqhk.co/zimalodepafo/d4ijEFv/sapuzirubukifewi.pdf
    • https://cdn.sqhk.co/rifarako/riegjLP/44011315712.pdf
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/fakigu-manejoxuze-fefelazozebur-fodosoguwat.pdf
    • http://mignonette.space/zorobojiqx71a.pdf
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/rebebusenukimob.pdf
    • https://cdn.sqhk.co/depifozopupe/egjeWmk/chief_followers_mod.pdf
    • https://cdn.sqhk.co/mafowixodi/KUjiKWD/starz_tv_series_to_watch.pdf
    • https://cdn.sqhk.co/rivinodati/y2jcLMT/filebuvix.pdf
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/fapapilu-tasidovu.pdf
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/d83ed38cba4e94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_82b34643ff024741a5d297505f5743d3.pdf?index=true
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_1e94bd663b544daf8b5e5941aa418e18.pdf?index=true
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_15b8ec7d59354cfbab00d28386c57f6f.pdf?index=true
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_dcd3ebd500024373b988392ed5efd7f0.pdf?index=true
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_b781853e8619441f8e1d62dc6530d24d.pdf?index=true
    • 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_off0000ef75.bin
00893b3524e6307536de157dc09a227756e6e514ae0d1eba8cd90273a6be10c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 5504 bytes
font_01_sfnt_off00010247.bin
f7b93222e14ca497f71eca2bb6c877a2de8129b6941b2919e7e2a359649c3e2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10247 10620 bytes

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