Malicious PDF — malware analysis report

Static analysis result for SHA-256 a463e3faf9f50ba8…

MALICIOUS

PDF

78.5 KB Created: 2020-11-12 14:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a227e8543ec465794d9ac3144d50795f SHA-1: 7da363505de7b2e4cc792d25f76025fa6b8aa95b SHA-256: a463e3faf9f50ba84647bb3702d083e2fb458c4889d3e19d2b92e6e099deb305
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with several pointing to known malicious redirector infrastructure and a large link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=5e+best+warlock+feats
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/8989842.pdf
    • https://kobijetiva.weebly.com/uploads/1/3/4/3/134322382/zepinomawifim_sedagutin_fasikado_vefofizax.pdf
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/watak_kozule.pdf
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5f9e4e94e7306.pdf
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fa2f05f47e02.pdf
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/fotazanadi.pdf
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f971a199129f.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/ec73ce00cc29.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/titugome/upgrading_gae_bolg_animus.pdf
    • https://s3.amazonaws.com/bulalowisu/terraria_world_viewer_1.4.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64f.bin
4d1ca773cdd9e1336a08db3f205e2a9637ef67529114b514ec75ff7d094052fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 5200 bytes
font_01_sfnt_off00010827.bin
99e275c3bae8450f7e4102b5c7ed6f5a869f8ce6634bb62a5564624b95face4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10827 10896 bytes