Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a1e868ab814cf8…

MALICIOUS

PDF

105.3 KB Created: 2021-01-25 15:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 48ddfca1556e391f4e94fea6a1380a8d SHA-1: 35324ee3519c17ee8c831fefba05154d937fa820 SHA-256: 14a1e868ab814cf8bc6e09137d1357ba6f54e95959838feb0d86348b75a93f1f
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or known malicious redirectors, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to further malicious content or phishing pages. No scripts were extracted, but the presence of malicious links and the document's structure point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=dance+battle+song In PDF document text
    • https://cdn.sqhk.co/pasepizut/jbiipqj/zuguvujixujefudune.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/fc08a9916.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5ff952d2494e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418199/normal_60025e3d433e2.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/14hbGgc/mary_crown_the_empire_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383916/normal_5ffa36b8e19ba.pdfIn PDF document text
    • https://cdn.sqhk.co/vunofufi/eibhcx0/bovifumowepivobetodeko.pdfIn PDF document text
    • http://sigonalen.22web.org/pureza_de_maria_plataforma.pdfIn PDF document text
    • https://zoxalutaj.weebly.com/uploads/1/3/1/4/131407742/e8917deadfa2859.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/cf958bfaa86.pdfIn PDF document text
    • https://wuzetawitowozuz.weebly.com/uploads/1/3/1/3/131381497/3339424.pdfIn PDF document text
    • https://rogipusuwegurak.weebly.com/uploads/1/3/0/8/130813654/2c6e624a1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473947/normal_5fce1791bea66.pdfIn PDF document text
    • https://cdn.sqhk.co/suzironanes/d0jgphf/50108560554.pdfIn PDF document text
    • https://fenibelamej.weebly.com/uploads/1/3/4/4/134464240/5272641.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/luropi/4756478761.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/jebas.pdfIn PDF document text
    • http://tudifilik.rf.gd/36576354742.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/1569716033.pdfIn PDF document text
    • http://xakitidopapav.epizy.com/continuation_sheet_example.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/kronos_workforce_central_installation_guide.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/mupitako.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001639b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1639B 29608 bytes
SHA-256: f2b45b0a07e3bdedaa9c73f26784cb5eaa31fb1c8dc31b5f14711e363482f29b
font_00_sfnt_off00012eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAE 5012 bytes
SHA-256: 5c72a95bb9f72294082f31daea99c0f0a04cc5c56d39843195b25d7dfe962cd0
font_01_sfnt_off00013fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD1 10440 bytes
SHA-256: 28ab0344ef13886639960b3cf1a67163d5bac31fb6bafb118a17148d7b7b63ca