Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da9e48dd2d309ab…

MALICIOUS

PDF

85.3 KB Created: 2021-04-09 01:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1a865095dc5d3aae26e995452b7ca0db SHA-1: e146cd09ecd3cd244b795d6b6d8208c2dec7a82e SHA-256: 5da9e48dd2d309aba5d46c2b9cd182171abf9ad7fcfe59425093ea6b0acdcbfc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to 'Wordpress get plugins url', aligning with the heuristic findings of a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=wordpress+get+plugins+url PDF link annotation
    • https://cdn.sqhk.co/ralapogifur/Yhaidgi/poner_perfect_form.pdfIn PDF document text
    • https://cdn.sqhk.co/nepelusir/hb2Yjai/didier_raoult_wiki.pdfIn PDF document text
    • https://mexepuxirubu.weebly.com/uploads/1/3/4/6/134663189/xatebowadiju.pdfIn PDF document text
    • https://xoxizanelanoruf.weebly.com/uploads/1/3/0/7/130740612/1731861.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/bJYjidU/traffic_rider_ios_hack_2019.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/sopidinosaxufipikaj.pdfIn PDF document text
    • https://resonorur.weebly.com/uploads/1/3/4/8/134874279/ecc29551b.pdfIn PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/e49b58915.pdfIn PDF document text
    • https://woziwapimarezex.weebly.com/uploads/1/3/5/4/135400795/bavare-tekuxolonepesa-xidurudokaxi.pdfIn PDF document text
    • https://givozerav.weebly.com/uploads/1/3/2/7/132710596/buzewizonenav-newakegufo.pdfIn PDF document text
    • https://nexiwurepefisov.weebly.com/uploads/1/3/4/3/134372078/somofasuvovofav.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/0ffe3e891.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/6909234.pdfIn PDF document text
    • https://radixukawatezod.weebly.com/uploads/1/3/4/6/134645496/panutixisozizi_fizikotigevo_dagazaji_jopepum.pdfIn PDF document text
    • https://luzenesezenobo.weebly.com/uploads/1/3/5/3/135307250/5697842.pdfIn PDF document text
    • https://febamepu.weebly.com/uploads/1/3/1/0/131070604/bonamusirex.pdfIn PDF document text
    • https://nodejobirutita.weebly.com/uploads/1/3/4/7/134748641/310cdf8408aba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4fd7ac12-06e8-439c-96a9-7636004ccb32.filesusr.com/ugd/9554ab_28881c84d83542718c11f61ff20586ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/ratuxisotarisebivefuvino.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/93969978190.pdfIn PDF document text
    • https://5c9c3928-af7d-4195-9e43-9647d7263c15.filesusr.com/ugd/508998_4e9bb1de8bc74f088ddf519ee93ac188.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 4932 bytes
SHA-256: 5baebdbd4500397d1ccf47260deaaa6a983fbecb0a3c1b3f6460da9d450d3d79
font_01_sfnt_off00010df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF9 10556 bytes
SHA-256: 8c61e67bf8e900d89d6c91ff00b975717ea21b31703e391b6dc892d7c5aa7de5
font_02_sfnt_off0001324c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324C 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501