Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5c66252c7d20a0…

MALICIOUS

PDF

101.9 KB Created: 2021-06-13 05:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 138eab85f34855ffdeed080aa43d429b SHA-1: 53f806f0ffd9161d0a8df77b78fc7346b2210c62 SHA-256: 1d5c66252c7d20a0df6f5ec2136ce8ee5131eacfad10d64077d8960e98a90cfa
186 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'new hollywood movies telegram link', indicating a lure to attract clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

Heuristics 6

  • 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 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://krisoc.ru/pbw?utm_term=new+hollywood+movies+telegram+link PDF link annotation
    • https://mixosikopas.weebly.com/uploads/1/3/4/3/134383158/mupoxakagaloro.pdfIn PDF document text
    • https://pifabesi.weebly.com/uploads/1/3/5/9/135958575/6562623.pdfIn PDF document text
    • https://bajozofexowabir.weebly.com/uploads/1/3/1/3/131398176/metalorenukez-vitis-vepederufuku-bunadizumiv.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/a73a94.pdfIn PDF document text
    • https://lesidodulutenem.weebly.com/uploads/1/3/4/3/134352412/norip.pdfIn PDF document text
    • https://sawawinuta.weebly.com/uploads/1/3/1/6/131606003/51de2d.pdfIn PDF document text
    • https://seladimara.weebly.com/uploads/1/3/4/4/134460986/jumev_bapinanused_fafizomobi_mosujifebur.pdfIn PDF document text
    • https://dunifavopugi.weebly.com/uploads/1/3/5/3/135312205/4631464.pdfIn PDF document text
    • https://zogefiwodojur.weebly.com/uploads/1/3/4/3/134310711/885458.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/780265e.pdfIn PDF document text
    • https://vejefoxebeses.weebly.com/uploads/1/3/4/8/134860837/pomiketuwarado.pdfIn PDF document text
    • https://fiwetoki.weebly.com/uploads/1/3/4/2/134235589/ruwoxutupimoki.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/weronuxegevidu.pdfIn PDF document text
    • https://lejiwukepefi.weebly.com/uploads/1/3/4/4/134467113/zorejegu_kifolewitobu_nibujazo.pdfIn PDF document text
    • https://vegirizekor.weebly.com/uploads/1/3/1/4/131407876/8fc5da708.pdfIn PDF document text
    • https://rurawovupotoli.weebly.com/uploads/1/3/4/0/134017211/6019619.pdfIn PDF document text
    • https://falusawo.weebly.com/uploads/1/3/6/0/136084102/garijisuxaf.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/ad3736.pdfIn PDF document text
    • https://gekibuvun.weebly.com/uploads/1/3/4/3/134354697/6012712.pdfIn PDF document text
    • https://doxezasofe.weebly.com/uploads/1/3/6/0/136088479/eb3726f061e7d.pdfIn PDF document text
    • https://sidatotivokusud.weebly.com/uploads/1/3/5/9/135959985/wokavixajiped.pdfIn PDF document text
    • https://tiwokixaxuvap.weebly.com/uploads/1/3/4/2/134235176/kutixizuronasip_birafuxifuju_mamedafadativ_gesajimuxef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://wibajeku.pbworks.com/f/free_download_baby_shark.pdfIn PDF document text
    • http://jubujefaj.pbworks.com/f/nesarewilupitasoso.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/f/box_fight_fortnite_discord.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/w/file/fetch/144717129/lecturas_cortas_con_comprension_lectora_para_tercer_grado.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016012.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16012 17468 bytes
SHA-256: 5131db886874b9d72ed6fff6be79a52852f8d4be4949aa484f95cf9d5841b2aa
font_00_sfnt_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 3032 bytes
SHA-256: 0c036be27b9cd7caea670d193e5823c7292c1e2da6775c7956594f7f204d2d44
font_01_sfnt_off000128a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A3 5528 bytes
SHA-256: 24317043d9e39e39e2fa4dcfd1d568835a5d5645f345515ea69e1d2315ec9a3d
font_02_sfnt_off00013b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B63 10704 bytes
SHA-256: d022ca036cec7ee326ce2cddad82bee07b699a2932aff64c11701b4c2f7f8fe8
font_04_sfnt_off00017970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17970 3956 bytes
SHA-256: a7e8026506ac8a5117bd2ab2af72cd6f9d80ac4b59d3f354410456823283a874

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