Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02a060da6128e66…

MALICIOUS

PDF

85.7 KB Created: 2022-05-30 18:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: c9fc9bf28d81ff2fe38576439dd80b90 SHA-1: 7204216e6c995b2fcc6144fd9faa9c19962100da SHA-256: e02a060da6128e667c9730fa5a6586b3330c49fec987e4fc2f9a57a5fc0b1df4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, with the links likely serving to distribute further malware or engage in phishing. No scripts were extracted, but the structure and heuristic firings point to a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://cafij.co.za/YmrXLWy8?keyword=aha%20acls%20written%20test%20questions%20and%20answers%20sheet%20printable%20version PDF link annotation
    • http://dolekkoyum.com/admin/UserFiles/file/18906338076.pdfIn PDF document text
    • http://popmetre.com/news/files/xusarediwidigexa.pdfIn PDF document text
    • https://tibikinadip.weebly.com/uploads/1/3/1/8/131856726/negom.pdfIn PDF document text
    • https://kalodutizifurul.weebly.com/uploads/1/3/4/5/134597908/f81a46b064fc6.pdfIn PDF document text
    • https://fatatarulawug.weebly.com/uploads/1/3/4/4/134474158/sojatenew-loxeki-xisikazaw-zowemumuxale.pdfIn PDF document text
    • https://togodinaxudare.weebly.com/uploads/1/3/1/6/131637070/zagepuwekaleba-zoruk.pdfIn PDF document text
    • https://wububored.weebly.com/uploads/1/3/4/0/134042895/23ccbd1f.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1624108d090041---radaxumubuxudide.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/3625624018.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/dazaperirenijilafonuxupu.pdfIn PDF document text
    • https://wexigovepabenu.weebly.com/uploads/1/3/0/7/130738565/695261.pdfIn PDF document text
    • https://rovumixonisi.weebly.com/uploads/1/3/4/0/134012407/4377642.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/sarujabesin.pdfIn PDF document text
    • https://vapigutu.weebly.com/uploads/1/4/1/3/141352136/5b0a80c.pdfIn PDF document text
    • http://checopharma.com/upload/files/59978215535.pdfIn PDF document text
    • https://pijolonaponezu.weebly.com/uploads/1/3/4/8/134879261/nunuguribo.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/kiriviwovejaro.pdfIn PDF document text
    • https://telefaxukewinet.weebly.com/uploads/1/3/4/3/134320065/nafafit.pdfIn PDF document text
    • https://coil.hk/upload/files/movitodemaxijipodogevevik.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1627725fbd6fa1---pelugufogowe.pdfIn PDF document text
    • https://jidubolepu.weebly.com/uploads/1/4/1/3/141350099/xovatevazev-jakuzuxajugefin-giseja.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/c3618e74bf0c.pdfIn PDF document text
    • https://polosaguri.weebly.com/uploads/1/4/1/4/141415529/mitugonobovemu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93A 17300 bytes
SHA-256: a72d1c3fef54a03c511584548ea2bf014b097eff26bc4e9285dcb46547a6486e
font_01_sfnt_off0001167c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 11128 bytes
SHA-256: 3b87695c89439ec22196b18aed2d0eb010528b323943706c413ca9285808e4c6
font_02_sfnt_off00013015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13015 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1