Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3744bd78da039a…

MALICIOUS

PDF

79.0 KB Created: 2021-06-10 15:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 72d79eefc85acb411d2c95109b779b16 SHA-1: 8fa6f3cb324ce78c98d792ee1a4819a4d045a1f6 SHA-256: 0b3744bd78da039a9025391266f2b94ccaaf19adff1fee5617a888bd2079177b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, suggesting it functions as a link farm. The primary URL, 'https://crysiq.ru/pbw?utm_term=chak+de+india+watch+online+english+subtitles', appears to be a lure for potentially unwanted content or further malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/pbw?utm_term=chak+de+india+watch+online+english+subtitles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374207/normal_601500794ba1d.pdfIn PDF document text
    • https://parukiwodisurup.weebly.com/uploads/1/3/4/4/134455528/20c78e8d2d.pdfIn PDF document text
    • https://jivimukik.weebly.com/uploads/1/3/0/7/130775904/xamijetazej_fosuzokuwukulo_xasixufofuz_nitogutado.pdfIn PDF document text
    • https://kizubunutasi.weebly.com/uploads/1/3/5/3/135348794/cba1cee9890dbd.pdfIn PDF document text
    • https://bitusuverutito.weebly.com/uploads/1/3/1/8/131871453/3266144.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422133/normal_5fef82898a5c0.pdfIn PDF document text
    • https://wufavupo.weebly.com/uploads/1/3/4/3/134319323/rusute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_603270dfaa686.pdfIn PDF document text
    • https://wodumipanopova.weebly.com/uploads/1/3/4/7/134731655/mavovovufizipati.pdfIn PDF document text
    • https://jaxumemiri.weebly.com/uploads/1/3/4/4/134465633/sazunuxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375344/normal_5fcf3d198c6ca.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/3087339.pdfIn PDF document text
    • https://xugowumilivave.weebly.com/uploads/1/3/4/8/134846580/tizefipos.pdfIn PDF document text
    • https://beginuvemosuso.weebly.com/uploads/1/3/4/6/134699988/616fc8d0.pdfIn PDF document text
    • https://vakejijumusefuv.weebly.com/uploads/1/3/5/3/135313512/radogilewonased_losetaza_tipilol.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/xepotipiwaf.pdfIn PDF document text
    • https://pepibugogik.weebly.com/uploads/1/3/1/0/131069762/lirowuvavo.pdfIn PDF document text
    • https://puranezujifa.weebly.com/uploads/1/3/4/5/134582728/xaxos.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
    • http://wozixokumo.pbworks.com/w/file/fetch/145023264/shree_ram_janki_baithe_hai_mp3_download.pdfIn PDF document text
    • http://wasazejis.pbworks.com/f/car_logo_reveal_after_effects_template_free.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 5304 bytes
SHA-256: 0acc23a5d6c0fc7d9d0425bfb92f498e5585efa779423da09a568f79ed077046
font_01_sfnt_off0000fc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8C 10576 bytes
SHA-256: 574f4e5d26c6c786cf1f7d86f43cfec226fe5a1b757b7fe1fd3fcd959f957203
font_02_sfnt_off00012082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12082 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71