Malicious PDF — malware analysis report

Static analysis result for SHA-256 2634c9b40a1c952a…

MALICIOUS

PDF

32.9 KB Created: 2020-05-15 11:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 4e8dd093ccceb8e3b8a5c580e225c869 SHA-1: 32ac566eaf7a723c9c37a5ac887ea06ae15f4dae SHA-256: 2634c9b40a1c952a7dceb8f32038cacb33adcceaa9e57bb5cabe37c80ff6a957
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, indicating a link farm or SEO manipulation tactic. The document body contains text related to a movie title and authoring application details, but the primary malicious activity appears to be the distribution of numerous URLs. No scripts were extracted from this sample, limiting the ability to determine further payload delivery or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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 http://airphones.org/uploads/1/3/0/6/130620228/130620228.html#kaala+koothu+movie+free PDF link annotation
    • http://aidbprestige.com/uploads/1/3/1/4/131409841/lenotukiwu-rupubigasalig-kevepebetu-kabitu.pdfIn PDF document text
    • http://storemake.net/uploads/1/3/1/3/131384714/3738122.pdfIn PDF document text
    • http://thinkhighly.org/uploads/1/3/0/2/130272877/vovasunetibox_zusurafajofol_redabus_zisurubu.pdfIn PDF document text
    • http://saramelina.org/uploads/1/3/0/6/130604162/5907542.pdfIn PDF document text
    • http://globaldiscountstores.com/uploads/1/3/1/4/131438225/20ee6f.pdfIn PDF document text
    • http://recrias.com/uploads/1/3/0/7/130776457/51683.pdfIn PDF document text
    • http://heritageshellfish.com/uploads/1/3/0/8/130814921/xowulif.pdfIn PDF document text
    • http://mujereslunacreciente.com/uploads/1/3/1/1/131164297/vosakosuzidir_zunerala_wevasutunu.pdfIn PDF document text
    • http://permezone.com/uploads/1/3/1/3/131398220/tuxowodamob.pdfIn PDF document text
    • http://my2handsstudio.com/uploads/1/3/0/6/130603978/nivotagewof-gugefusasi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5707 9848 bytes
SHA-256: c30708beffff6716a27292a105b44bce4d613ebe886802b3f8d9e24cd99bafb4