Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca7ff66aae6e2f8…

MALICIOUS

PDF

92.3 KB Created: 2021-03-31 12:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0d76fa77bb0b08ca2ced4a2d1d3a5e79 SHA-1: 419dfcb43c8a2bcfcd16e156eb2ba503fc1a85b9 SHA-256: 3ca7ff66aae6e2f8c9712da099ac195c9c0dc55438991b8c53404aa6cabb9711
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. The file contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of URLs like 'soxebez.ru' and numerous Weebly-hosted PDFs points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://soxebez.ru/strik?utm_term=dell+precision+m6700+i7+3740qm+specs PDF link annotation
    • https://wetarotener.weebly.com/uploads/1/3/0/8/130813606/putotanomoziru_difidul_sapevuxudeva_datatiwodube.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/gifomex.pdfIn PDF document text
    • http://rollernefritmassage.xyz/85166068917k99ii.pdfIn PDF document text
    • https://nikakakuko.weebly.com/uploads/1/3/1/8/131871571/3110960.pdfIn PDF document text
    • http://lnstagramcentre.net/rizijugafisirazasevefy3g3q.pdfIn PDF document text
    • https://pepajodik.weebly.com/uploads/1/3/1/4/131453945/295c8eb248f7.pdfIn PDF document text
    • http://gtomishebs.xyz/epictetus_the_handbook_section_28zntpp.pdfIn PDF document text
    • http://pressit.space/81181724102by03t.pdfIn PDF document text
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/fabizomodom.pdfIn PDF document text
    • http://bilkaita.space/translation_reflection_rotation_dilation_worksheetcp1qx.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/why_wont_my_washer_drain_the_water1esq0.pdfIn PDF document text
    • https://famuzupowaja.weebly.com/uploads/1/3/1/4/131406758/risufodogaz-madumovaluk-wusutujojupase-gumad.pdfIn PDF document text
    • https://vojutodebol.weebly.com/uploads/1/3/4/0/134096580/buminesokepib.pdfIn PDF document text
    • https://giximanuv.weebly.com/uploads/1/3/4/5/134526051/wexek.pdfIn PDF document text
    • http://tuimag.ru/626913993456a2vu.pdfIn PDF document text
    • http://activa-fb.com/why_did_prehistory_end810j7.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/lujatibuwovotufemosazenat1mnf.pdfIn PDF document text
    • https://mobofapewapo.weebly.com/uploads/1/3/5/3/135399527/cfc092.pdfIn PDF document text
    • https://kinijenu.weebly.com/uploads/1/3/4/6/134641264/fopabepi-legekalomidukot.pdfIn PDF document text
    • http://shop-profildoors.ru/33189075598n7m4b.pdfIn PDF document text
    • https://wufurivukotep.weebly.com/uploads/1/3/4/5/134585879/dabiverolesorus.pdfIn PDF document text
    • https://gexawagezawa.weebly.com/uploads/1/3/2/6/132682787/66f405.pdfIn PDF document text
    • http://zdorovienashevse.xyz/29098252116bx1k.pdfIn PDF document text
    • https://pixiguva.weebly.com/uploads/1/3/2/6/132681827/84b42546d00567.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://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_off000109df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DF 5328 bytes
SHA-256: deca8f391b2083a0877adc1bdcee1b86d6fda520e00996a77acf7c6651464996
font_01_sfnt_off00011bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDF 25196 bytes
SHA-256: 33b7d1f5f42d6be78f75674e3e7745079aeccae8f16305bd16d9510c716b172e
font_02_sfnt_off00015342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15342 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230