Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe9bc47d5a6745a…

MALICIOUS

PDF

78.7 KB Created: 2021-04-05 22:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8ccf0173648d991a2e89709616005ee5 SHA-1: 51767103134333e8d357ed8b3b63f9762d30c1bc SHA-256: ebe9bc47d5a6745a63528e5599b070a34eaf3c2ac5a2e9e3fb4048d2a5d82c75
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=entrepreneurship+class+12+ncert+book+pdf PDF link annotation
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/4344013.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/ropavorukorulatena.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444098/normal_5fc64e14c409d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_5fe80bc51a5aa.pdfIn PDF document text
    • https://gifolavetufo.weebly.com/uploads/1/3/2/6/132695571/rabedude-wumezepokil-kudiveterixas-gifun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377697/normal_5fef7e6579d39.pdfIn PDF document text
    • https://jodowofimen.weebly.com/uploads/1/3/5/3/135330599/karimupu.pdfIn PDF document text
    • http://zimipodetasasa.iblogger.org/58708026924.pdfIn PDF document text
    • https://ravuwiva.weebly.com/uploads/1/3/4/5/134519437/mixobo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501206/normal_5fe2eebded3a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/falevi/where_can_i_get_an_access_code_for_pearson.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_ba7af33ad649438c803491c97a7f4ce5.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_6b44a2138f684eaaad63c4a5d06209b2.pdf?index=trueIn PDF document text
    • http://barirenuvekesup.epizy.com/surah_yasin_full_bangla.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_edb29f4e37b944439b7e359785a369c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tapelu/33041382913.pdfIn PDF document text
    • https://3c8d80e7-2998-4b53-b1db-ea2053e4eee2.filesusr.com/ugd/5c8c55_fd00fb7a0da144b38c483c3535c7a3f8.pdf?index=trueIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_760b69a2f9f845dd924a3b233c1253c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/how_a_bill_becomes_a_law_12_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/dozatipepotamupoletuveriw.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/angiography_video_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF319 5588 bytes
SHA-256: 74fbf3f4bb0f7c45f8f4ac06143394214edc281ef264851293e265ffbf9d76ab
font_01_sfnt_off00010618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 11008 bytes
SHA-256: a8810c01c92b4f50210f99b5b5f0a80ad181ae84ea34bc871fd87b82b7160d22